1421130340 has 72 divisors (see below), whose sum is σ = 3537249912. Its totient is φ = 478033920.

The previous prime is 1421130329. The next prime is 1421130377. The reversal of 1421130340 is 430311241.

It can be written as a sum of positive squares in 4 ways, for example, as 314636644 + 1106493696 = 17738^2 + 33264^2 .

It is a super-2 number, since 2×1421130340² = 4039222886537031200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38260 + ... + 65620.

It is an arithmetic number, because the mean of its divisors is an integer number (49128471).

Almost surely, 2^1421130340 is an apocalyptic number.

1421130340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421130340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768624956).

1421130340 is an abundant number, since it is smaller than the sum of its proper divisors (2116119572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421130340 is a wasteful number, since it uses less digits than its factorization.

1421130340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27437 (or 27428 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1421130340 is about 37697.8824338981. The cubic root of 1421130340 is about 1124.2890230351.

Adding to 1421130340 its reverse (430311241), we get a palindrome (1851441581).

It can be divided in two parts, 14211 and 30340, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 1421130340 in words is "one billion, four hundred twenty-one million, one hundred thirty thousand, three hundred forty".