139851081 has 12 divisors (see below), whose sum is σ = 203056308. Its totient is φ = 92749824.

The previous prime is 139851067. The next prime is 139851119. The reversal of 139851081 is 180158931.

139851081 is a `hidden beast` number, since 139 + 8 + 510 + 8 + 1 = 666.

139851081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11799225 + 128051856 = 3435^2 + 11316^2 .

It is not a de Polignac number, because 139851081 - 2¹³ = 139842889 is a prime.

It is a super-2 number, since 2×139851081² = 39116649713737122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (139859081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38520 + ... + 41993.

It is an arithmetic number, because the mean of its divisors is an integer number (16921359).

Almost surely, 2^139851081 is an apocalyptic number.

It is an amenable number.

139851081 is a deficient number, since it is larger than the sum of its proper divisors (63205227).

139851081 is a wasteful number, since it uses less digits than its factorization.

139851081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80712 (or 80709 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 139851081 is about 11825.8649155146. The cubic root of 139851081 is about 519.0652350980.

The spelling of 139851081 in words is "one hundred thirty-nine million, eight hundred fifty-one thousand, eighty-one".