139285250 has 64 divisors (see below), whose sum is σ = 297434592. Its totient is φ = 48384000.

The previous prime is 139285249. The next prime is 139285261. The reversal of 139285250 is 52582931.

It can be written as a sum of positive squares in 16 ways, for example, as 49547521 + 89737729 = 7039^2 + 9473^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139285250.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53990 + ... + 56510.

Almost surely, 2^139285250 is an apocalyptic number.

139285250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139285250 is an abundant number, since it is smaller than the sum of its proper divisors (158149342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139285250 is a wasteful number, since it uses less digits than its factorization.

139285250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 139285250 is about 11801.9172171304. The cubic root of 139285250 is about 518.3642508919.

The spelling of 139285250 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, two hundred fifty".