102781356 has 12 divisors (see below), whose sum is σ = 239823192. Its totient is φ = 34260448.

The previous prime is 102781351. The next prime is 102781361. The reversal of 102781356 is 653187201.

It is an interprime number because it is at equal distance from previous prime (102781351) and next prime (102781361).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (102781351) 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, 4282545 + ... + 4282568.

It is an arithmetic number, because the mean of its divisors is an integer number (19985266).

Almost surely, 2^102781356 is an apocalyptic number.

It is an amenable number.

102781356 is an abundant number, since it is smaller than the sum of its proper divisors (137041836).

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

102781356 is a wasteful number, since it uses less digits than its factorization.

102781356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8565120 (or 8565118 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 102781356 is about 10138.1140257939. The cubic root of 102781356 is about 468.4228955610.

The spelling of 102781356 in words is "one hundred two million, seven hundred eighty-one thousand, three hundred fifty-six".