139074221 has 16 divisors (see below), whose sum is σ = 164024448. Its totient is φ = 116251200.

The previous prime is 139074217. The next prime is 139074223. The reversal of 139074221 is 122470931.

It is not a de Polignac number, because 139074221 - 2² = 139074217 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 (139074223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37856 + ... + 41366.

It is an arithmetic number, because the mean of its divisors is an integer number (10251528).

Almost surely, 2^139074221 is an apocalyptic number.

139074221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139074221 is a deficient number, since it is larger than the sum of its proper divisors (24950227).

139074221 is a wasteful number, since it uses less digits than its factorization.

139074221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 139074221 is about 11792.9733740054. The cubic root of 139074221 is about 518.1023299274.

The spelling of 139074221 in words is "one hundred thirty-nine million, seventy-four thousand, two hundred twenty-one".