139155145 has 16 divisors (see below), whose sum is σ = 176811840. Its totient is φ = 104842944.

The previous prime is 139155139. The next prime is 139155161. The reversal of 139155145 is 541551931.

It is a cyclic number.

It is not a de Polignac number, because 139155145 - 2⁷ = 139155017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139155145.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12202 + ... + 20668.

It is an arithmetic number, because the mean of its divisors is an integer number (11050740).

Almost surely, 2^139155145 is an apocalyptic number.

It is an amenable number.

139155145 is a deficient number, since it is larger than the sum of its proper divisors (37656695).

139155145 is a wasteful number, since it uses less digits than its factorization.

139155145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664.

The product of its digits is 13500, while the sum is 34.

The square root of 139155145 is about 11796.4039011895. The cubic root of 139155145 is about 518.2028009402.

The spelling of 139155145 in words is "one hundred thirty-nine million, one hundred fifty-five thousand, one hundred forty-five".