971212540 has 12 divisors (see below), whose sum is σ = 2039546376. Its totient is φ = 388485008.

The previous prime is 971212483. The next prime is 971212573. The reversal of 971212540 is 45212179.

It is a congruent number.

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, 24280294 + ... + 24280333.

It is an arithmetic number, because the mean of its divisors is an integer number (169962198).

Almost surely, 2^971212540 is an apocalyptic number.

It is an amenable number.

971212540 is an abundant number, since it is smaller than the sum of its proper divisors (1068333836).

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

971212540 is a wasteful number, since it uses less digits than its factorization.

971212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48560636 (or 48560634 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 971212540 is about 31164.2830817588. The cubic root of 971212540 is about 990.3105987312.

The spelling of 971212540 in words is "nine hundred seventy-one million, two hundred twelve thousand, five hundred forty".