102405956 has 6 divisors (see below), whose sum is σ = 179210430. Its totient is φ = 51202976.

The previous prime is 102405937. The next prime is 102405967. The reversal of 102405956 is 659504201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101324356 + 1081600 = 10066^2 + 1040^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800741 + ... + 12800748.

It is an arithmetic number, because the mean of its divisors is an integer number (29868405).

Almost surely, 2^102405956 is an apocalyptic number.

It is an amenable number.

102405956 is a deficient number, since it is larger than the sum of its proper divisors (76804474).

102405956 is a wasteful number, since it uses less digits than its factorization.

102405956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25601493 (or 25601491 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 102405956 is about 10119.5827977244. The cubic root of 102405956 is about 467.8519084849.

The spelling of 102405956 in words is "one hundred two million, four hundred five thousand, nine hundred fifty-six".