102861957 has 32 divisors (see below), whose sum is σ = 158837760. Its totient is φ = 58593920.

The previous prime is 102861949. The next prime is 102861971. The reversal of 102861957 is 759168201.

It is not a de Polignac number, because 102861957 - 2³ = 102861949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102861947) 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, 43633 + ... + 45929.

It is an arithmetic number, because the mean of its divisors is an integer number (4963680).

Almost surely, 2^102861957 is an apocalyptic number.

It is an amenable number.

102861957 is a deficient number, since it is larger than the sum of its proper divisors (55975803).

102861957 is a wasteful number, since it uses less digits than its factorization.

102861957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 102861957 is about 10142.0883944087. The cubic root of 102861957 is about 468.5453091009.

The spelling of 102861957 in words is "one hundred two million, eight hundred sixty-one thousand, nine hundred fifty-seven".