425521992 has 32 divisors (see below), whose sum is σ = 1215777600. Its totient is φ = 121577664.

The previous prime is 425521991. The next prime is 425521997. The reversal of 425521992 is 299125524.

It is a self number, because there is not a number n which added to its sum of digits gives 425521992.

It is not an unprimeable number, because it can be changed into a prime (425521991) 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, 1266267 + ... + 1266602.

It is an arithmetic number, because the mean of its divisors is an integer number (37993050).

Almost surely, 2^425521992 is an apocalyptic number.

425521992 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

425521992 is an abundant number, since it is smaller than the sum of its proper divisors (790255608).

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

425521992 is a wasteful number, since it uses less digits than its factorization.

425521992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532885 (or 2532881 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 425521992 is about 20628.1844087161. The cubic root of 425521992 is about 752.1549825808.

It can be divided in two parts, 42552 and 1992, that added together give a palindrome (44544).

The spelling of 425521992 in words is "four hundred twenty-five million, five hundred twenty-one thousand, nine hundred ninety-two".