102131406 has 24 divisors (see below), whose sum is σ = 238307160. Its totient is φ = 31424976.

The previous prime is 102131389. The next prime is 102131411. The reversal of 102131406 is 604131201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217996 + ... + 218463.

It is an arithmetic number, because the mean of its divisors is an integer number (9929465).

Almost surely, 2^102131406 is an apocalyptic number.

102131406 is an abundant number, since it is smaller than the sum of its proper divisors (136175754).

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

102131406 is a wasteful number, since it uses less digits than its factorization.

102131406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436480 (or 436477 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 102131406 is about 10106.0084108415. The cubic root of 102131406 is about 467.4334311880.

Adding to 102131406 its reverse (604131201), we get a palindrome (706262607).

The spelling of 102131406 in words is "one hundred two million, one hundred thirty-one thousand, four hundred six".