102139051 has 8 divisors (see below), whose sum is σ = 116792064. Its totient is φ = 87501480.

The previous prime is 102139049. The next prime is 102139133. The reversal of 102139051 is 150931201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102139051 - 2¹ = 102139049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102139001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21066 + ... + 25456.

It is an arithmetic number, because the mean of its divisors is an integer number (14599008).

Almost surely, 2^102139051 is an apocalyptic number.

102139051 is a deficient number, since it is larger than the sum of its proper divisors (14653013).

102139051 is an equidigital number, since it uses as much as digits as its factorization.

102139051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 102139051 is about 10106.3866440979. The cubic root of 102139051 is about 467.4450940694.

The spelling of 102139051 in words is "one hundred two million, one hundred thirty-nine thousand, fifty-one".