139452761 has 8 divisors (see below), whose sum is σ = 167762880. Its totient is φ = 113239728.

The previous prime is 139452757. The next prime is 139452763. The reversal of 139452761 is 167254931.

139452761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139452761 - 2² = 139452757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139452763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524126 + ... + 524391.

It is an arithmetic number, because the mean of its divisors is an integer number (20970360).

Almost surely, 2^139452761 is an apocalyptic number.

It is an amenable number.

139452761 is a deficient number, since it is larger than the sum of its proper divisors (28310119).

139452761 is a wasteful number, since it uses less digits than its factorization.

139452761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048543.

The product of its digits is 45360, while the sum is 38.

The square root of 139452761 is about 11809.0118553586. The cubic root of 139452761 is about 518.5719707282.

The spelling of 139452761 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, seven hundred sixty-one".