1421251340 has 48 divisors (see below), whose sum is σ = 3170591424. Its totient is φ = 533299200.

The previous prime is 1421251309. The next prime is 1421251373. The reversal of 1421251340 is 431521241.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99020 + ... + 112460.

It is an arithmetic number, because the mean of its divisors is an integer number (66053988).

Almost surely, 2^1421251340 is an apocalyptic number.

1421251340 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 1421251340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585295712).

1421251340 is an abundant number, since it is smaller than the sum of its proper divisors (1749340084).

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

1421251340 is a wasteful number, since it uses less digits than its factorization.

1421251340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13778 (or 13776 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1421251340 is about 37699.4872644178. The cubic root of 1421251340 is about 1124.3209307608.

Adding to 1421251340 its reverse (431521241), we get a palindrome (1852772581).

The spelling of 1421251340 in words is "one billion, four hundred twenty-one million, two hundred fifty-one thousand, three hundred forty".