139246481 has 8 divisors (see below), whose sum is σ = 152168544. Its totient is φ = 126368320.

The previous prime is 139246453. The next prime is 139246493. The reversal of 139246481 is 184642931.

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

It is a cyclic number.

It is not a de Polignac number, because 139246481 - 2⁶ = 139246417 is a prime.

It is a super-2 number, since 2×139246481² = 38779164941766722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139246181) 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, 4151 + ... + 17196.

It is an arithmetic number, because the mean of its divisors is an integer number (19021068).

Almost surely, 2^139246481 is an apocalyptic number.

139246481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139246481 is a deficient number, since it is larger than the sum of its proper divisors (12922063).

139246481 is a wasteful number, since it uses less digits than its factorization.

139246481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21951.

The product of its digits is 41472, while the sum is 38.

The square root of 139246481 is about 11800.2746154486. The cubic root of 139246481 is about 518.3161521676.

The spelling of 139246481 in words is "one hundred thirty-nine million, two hundred forty-six thousand, four hundred eighty-one".