671572120 has 16 divisors (see below), whose sum is σ = 1511037360. Its totient is φ = 268628832.

The previous prime is 671572117. The next prime is 671572123. The reversal of 671572120 is 21275176.

It is an interprime number because it is at equal distance from previous prime (671572117) and next prime (671572123).

It is a super-2 number, since 2×671572120² = 902018224722588800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671572123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8394612 + ... + 8394691.

It is an arithmetic number, because the mean of its divisors is an integer number (94439835).

Almost surely, 2^671572120 is an apocalyptic number.

It is an amenable number.

671572120 is an abundant number, since it is smaller than the sum of its proper divisors (839465240).

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

671572120 is a wasteful number, since it uses less digits than its factorization.

671572120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789314 (or 16789310 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 671572120 is about 25914.7085648286. The cubic root of 671572120 is about 875.7178848712.

The spelling of 671572120 in words is "six hundred seventy-one million, five hundred seventy-two thousand, one hundred twenty".