139815002 has 16 divisors (see below), whose sum is σ = 217789992. Its totient is φ = 67265280.

The previous prime is 139815001. The next prime is 139815019. The reversal of 139815002 is 200518931.

It can be written as a sum of positive squares in 4 ways, for example, as 110859841 + 28955161 = 10529^2 + 5381^2 .

It is not an unprimeable number, because it can be changed into a prime (139815001) 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, 5693 + ... + 17664.

Almost surely, 2^139815002 is an apocalyptic number.

139815002 is a deficient number, since it is larger than the sum of its proper divisors (77974990).

139815002 is a wasteful number, since it uses less digits than its factorization.

139815002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23473.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 139815002 is about 11824.3393895811. The cubic root of 139815002 is about 519.0205948394.

The spelling of 139815002 in words is "one hundred thirty-nine million, eight hundred fifteen thousand, two".