139270521 has 8 divisors (see below), whose sum is σ = 199978240. Its totient is φ = 85704912.

The previous prime is 139270519. The next prime is 139270559. The reversal of 139270521 is 125072931.

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

It is not a de Polignac number, because 139270521 - 2¹ = 139270519 is a prime.

It is a super-2 number, since 2×139270521² = 38792556039222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139270921) 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 7 ways as a sum of consecutive naturals, for example, 1785481 + ... + 1785558.

It is an arithmetic number, because the mean of its divisors is an integer number (24997280).

Almost surely, 2^139270521 is an apocalyptic number.

It is an amenable number.

139270521 is a deficient number, since it is larger than the sum of its proper divisors (60707719).

139270521 is a wasteful number, since it uses less digits than its factorization.

139270521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571055.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 139270521 is about 11801.2931918498. The cubic root of 139270521 is about 518.3459784230.

The spelling of 139270521 in words is "one hundred thirty-nine million, two hundred seventy thousand, five hundred twenty-one".