97521642 has 24 divisors (see below), whose sum is σ = 222418560. Its totient is φ = 30796200.

The previous prime is 97521637. The next prime is 97521647. The reversal of 97521642 is 24612579.

97521642 is a `hidden beast` number, since 9 + 7 + 5 + 2 + 1 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (97521637) and next prime (97521647).

It is a junction number, because it is equal to n+sod(n) for n = 97521597 and 97521606.

It is not an unprimeable number, because it can be changed into a prime (97521647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142234 + ... + 142917.

It is an arithmetic number, because the mean of its divisors is an integer number (9267440).

Almost surely, 2^97521642 is an apocalyptic number.

97521642 is an abundant number, since it is smaller than the sum of its proper divisors (124896918).

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

97521642 is a wasteful number, since it uses less digits than its factorization.

97521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285178 (or 285175 counting only the distinct ones).

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

The square root of 97521642 is about 9875.3046535284. The cubic root of 97521642 is about 460.2922559929.

The spelling of 97521642 in words is "ninety-seven million, five hundred twenty-one thousand, six hundred forty-two".