139410481 has 4 divisors (see below), whose sum is σ = 159326272. Its totient is φ = 119494692.

The previous prime is 139410463. The next prime is 139410517. The reversal of 139410481 is 184014931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184014931 = 43 ⋅4279417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139410481 is a prime.

It is a super-2 number, since 2×139410481² = 38870564425302722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139410181) 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 3 ways as a sum of consecutive naturals, for example, 9957885 + ... + 9957898.

It is an arithmetic number, because the mean of its divisors is an integer number (39831568).

Almost surely, 2^139410481 is an apocalyptic number.

It is an amenable number.

139410481 is a deficient number, since it is larger than the sum of its proper divisors (19915791).

139410481 is an equidigital number, since it uses as much as digits as its factorization.

139410481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19915790.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 139410481 is about 11807.2215614005. The cubic root of 139410481 is about 518.5195576650.

The spelling of 139410481 in words is "one hundred thirty-nine million, four hundred ten thousand, four hundred eighty-one".