197157942 has 64 divisors (see below), whose sum is σ = 466119360. Its totient is φ = 61558272.

The previous prime is 197157937. The next prime is 197157943. The reversal of 197157942 is 249751791.

197157942 is a `hidden beast` number, since 1 + 9 + 71 + 579 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197157943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268608 + ... + 269340.

It is an arithmetic number, because the mean of its divisors is an integer number (7283115).

Almost surely, 2^197157942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197157942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233059680).

197157942 is an abundant number, since it is smaller than the sum of its proper divisors (268961418).

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

197157942 is a wasteful number, since it uses less digits than its factorization.

197157942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1048 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 197157942 is about 14041.2941711225. The cubic root of 197157942 is about 582.0202458681.

The spelling of 197157942 in words is "one hundred ninety-seven million, one hundred fifty-seven thousand, nine hundred forty-two".