1021251432 has 16 divisors (see below), whose sum is σ = 2553128640. Its totient is φ = 340417136.

The previous prime is 1021251403. The next prime is 1021251457. The reversal of 1021251432 is 2341521201.

It is a junction number, because it is equal to n+sod(n) for n = 1021251399 and 1021251408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21276048 + ... + 21276095.

It is an arithmetic number, because the mean of its divisors is an integer number (159570540).

Almost surely, 2^1021251432 is an apocalyptic number.

1021251432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021251432 is an abundant number, since it is smaller than the sum of its proper divisors (1531877208).

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

1021251432 is a wasteful number, since it uses less digits than its factorization.

1021251432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42552152 (or 42552148 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1021251432 is about 31957.0247676469. The cubic root of 1021251432 is about 1007.0342144753.

Adding to 1021251432 its reverse (2341521201), we get a palindrome (3362772633).

The spelling of 1021251432 in words is "one billion, twenty-one million, two hundred fifty-one thousand, four hundred thirty-two".