139725151 has 4 divisors (see below), whose sum is σ = 139750000. Its totient is φ = 139700304.

The previous prime is 139725149. The next prime is 139725211. The reversal of 139725151 is 151527931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151527931 = 139 ⋅1090129.

It is a cyclic number.

It is not a de Polignac number, because 139725151 - 2¹ = 139725149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139725101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475 + ... + 16723.

It is an arithmetic number, because the mean of its divisors is an integer number (34937500).

Almost surely, 2^139725151 is an apocalyptic number.

139725151 is a deficient number, since it is larger than the sum of its proper divisors (24849).

139725151 is an equidigital number, since it uses as much as digits as its factorization.

139725151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24848.

The product of its digits is 9450, while the sum is 34.

The square root of 139725151 is about 11820.5393700964. The cubic root of 139725151 is about 518.9093895273.

It can be divided in two parts, 139725 and 151, that added together give a square (139876 = 374²).

The spelling of 139725151 in words is "one hundred thirty-nine million, seven hundred twenty-five thousand, one hundred fifty-one".