1421234440 has 32 divisors (see below), whose sum is σ = 3206384280. Its totient is φ = 566963712.

The previous prime is 1421234429. The next prime is 1421234443. The reversal of 1421234440 is 444321241.

It can be written as a sum of positive squares in 4 ways, for example, as 819905956 + 601328484 = 28634^2 + 24522^2 .

It is a super-2 number, since 2×1421234440² = 4039814666884227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421234443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32709 + ... + 62548.

Almost surely, 2^1421234440 is an apocalyptic number.

1421234440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421234440 is an abundant number, since it is smaller than the sum of its proper divisors (1785149840).

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

1421234440 is a wasteful number, since it uses less digits than its factorization.

1421234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95641 (or 95637 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1421234440 is about 37699.2631227720. The cubic root of 1421234440 is about 1124.3164743360.

Adding to 1421234440 its reverse (444321241), we get a palindrome (1865555681).

The spelling of 1421234440 in words is "one billion, four hundred twenty-one million, two hundred thirty-four thousand, four hundred forty".