139540502 has 8 divisors (see below), whose sum is σ = 210467712. Its totient is φ = 69384600.

The previous prime is 139540483. The next prime is 139540549. The reversal of 139540502 is 205045931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192374 + ... + 193097.

It is an arithmetic number, because the mean of its divisors is an integer number (26308464).

Almost surely, 2^139540502 is an apocalyptic number.

139540502 is a deficient number, since it is larger than the sum of its proper divisors (70927210).

139540502 is a wasteful number, since it uses less digits than its factorization.

139540502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385654.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 139540502 is about 11812.7262729651. The cubic root of 139540502 is about 518.6807064360.

The spelling of 139540502 in words is "one hundred thirty-nine million, five hundred forty thousand, five hundred two".