921075642 has 12 divisors (see below), whose sum is σ = 1995663930. Its totient is φ = 307025208.

The previous prime is 921075629. The next prime is 921075643. The reversal of 921075642 is 246570129.

921075642 is a `hidden beast` number, since 9 + 2 + 1 + 0 + 7 + 5 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 867361401 + 53714241 = 29451^2 + 7329^2 .

It is a junction number, because it is equal to n+sod(n) for n = 921075597 and 921075606.

It is not an unprimeable number, because it can be changed into a prime (921075643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25585417 + ... + 25585452.

Almost surely, 2^921075642 is an apocalyptic number.

921075642 is an abundant number, since it is smaller than the sum of its proper divisors (1074588288).

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

921075642 is a wasteful number, since it uses less digits than its factorization.

921075642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51170877 (or 51170874 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 921075642 is about 30349.2280297210. The cubic root of 921075642 is about 972.9677211249.

The spelling of 921075642 in words is "nine hundred twenty-one million, seventy-five thousand, six hundred forty-two".