139402534 has 8 divisors (see below), whose sum is σ = 209316528. Its totient is φ = 69630360.

The previous prime is 139402513. The next prime is 139402547. The reversal of 139402534 is 435204931.

139402534 is digitally balanced in base 3, 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 a junction number, because it is equal to n+sod(n) for n = 139402496 and 139402505.

It is a congruent number.

It is an unprimeable number.

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, 32962 + ... + 36949.

It is an arithmetic number, because the mean of its divisors is an integer number (26164566).

Almost surely, 2^139402534 is an apocalyptic number.

139402534 is a deficient number, since it is larger than the sum of its proper divisors (69913994).

139402534 is an equidigital number, since it uses as much as digits as its factorization.

139402534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70910.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 139402534 is about 11806.8850252723. The cubic root of 139402534 is about 518.5097048591.

The spelling of 139402534 in words is "one hundred thirty-nine million, four hundred two thousand, five hundred thirty-four".