139125051 has 24 divisors (see below), whose sum is σ = 216858096. Its totient is φ = 85440960.

The previous prime is 139125047. The next prime is 139125061. The reversal of 139125051 is 150521931.

It is not a de Polignac number, because 139125051 - 2² = 139125047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139125001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79041 + ... + 80781.

It is an arithmetic number, because the mean of its divisors is an integer number (9035754).

Almost surely, 2^139125051 is an apocalyptic number.

139125051 is a deficient number, since it is larger than the sum of its proper divisors (77733045).

139125051 is a wasteful number, since it uses less digits than its factorization.

139125051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 139125051 is about 11795.1282739952. The cubic root of 139125051 is about 518.1654423516.

Adding to 139125051 its reverse (150521931), we get a palindrome (289646982).

The spelling of 139125051 in words is "one hundred thirty-nine million, one hundred twenty-five thousand, fifty-one".