139454441 has 6 divisors (see below), whose sum is σ = 162222570. Its totient is φ = 119532336.

The previous prime is 139454431. The next prime is 139454459. The reversal of 139454441 is 144454931.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 25050025 = 10696^2 + 5005^2 .

It is not a de Polignac number, because 139454441 - 2⁶ = 139454377 is a prime.

It is a super-2 number, since 2×139454441² = 38895082229244962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139454431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1422956 + ... + 1423053.

It is an arithmetic number, because the mean of its divisors is an integer number (27037095).

Almost surely, 2^139454441 is an apocalyptic number.

It is an amenable number.

139454441 is a deficient number, since it is larger than the sum of its proper divisors (22768129).

139454441 is an equidigital number, since it uses as much as digits as its factorization.

139454441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846023 (or 2846016 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 139454441 is about 11809.0829872603. The cubic root of 139454441 is about 518.5740531476.

The spelling of 139454441 in words is "one hundred thirty-nine million, four hundred fifty-four thousand, four hundred forty-one".