102136405 has 32 divisors (see below), whose sum is σ = 148055040. Its totient is φ = 66151680.

The previous prime is 102136393. The next prime is 102136409. The reversal of 102136405 is 504631201.

It is not a de Polignac number, because 102136405 - 2⁵ = 102136373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102136409) 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, 46635 + ... + 48775.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^102136405 is an apocalyptic number.

It is an amenable number.

102136405 is a deficient number, since it is larger than the sum of its proper divisors (45918635).

102136405 is a wasteful number, since it uses less digits than its factorization.

102136405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 102136405 is about 10106.2557359291. The cubic root of 102136405 is about 467.4410575121.

Adding to 102136405 its reverse (504631201), we get a palindrome (606767606).

The spelling of 102136405 in words is "one hundred two million, one hundred thirty-six thousand, four hundred five".