97421571 has 30 divisors (see below), whose sum is σ = 152848540. Its totient is φ = 59793552.

The previous prime is 97421557. The next prime is 97421609. The reversal of 97421571 is 17512479.

It is a happy number.

It is not a de Polignac number, because 97421571 - 2⁵ = 97421539 is a prime.

It is a super-2 number, since 2×97421571² = 18981924992216082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97421501) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 256860 + ... + 257238.

Almost surely, 2^97421571 is an apocalyptic number.

97421571 is a deficient number, since it is larger than the sum of its proper divisors (55426969).

97421571 is an equidigital number, since it uses as much as digits as its factorization.

97421571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 395 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 97421571 is about 9870.2366233034. The cubic root of 97421571 is about 460.1347604540.

The spelling of 97421571 in words is "ninety-seven million, four hundred twenty-one thousand, five hundred seventy-one".