139812427225 has 81 divisors (see below), whose sum is σ = 189994523383. Its totient is φ = 102039907840.

The previous prime is 139812427201. The next prime is 139812427243. The reversal of 139812427225 is 522724218931.

It is a happy number.

The square root of 139812427225 is 373915.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 21509448921 + 118302978304 = 146661^2 + 343952^2 .

It is not a de Polignac number, because 139812427225 - 2²³ = 139804038617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1684487034 + ... + 1684487116.

Almost surely, 2^139812427225 is an apocalyptic number.

139812427225 is the 373915-th square number.

139812427225 is the 186958-th centered octagonal number.

It is an amenable number.

139812427225 is a deficient number, since it is larger than the sum of its proper divisors (50182096158).

139812427225 is an frugal number, since it uses more digits than its factorization.

139812427225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 158 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The spelling of 139812427225 in words is "one hundred thirty-nine billion, eight hundred twelve million, four hundred twenty-seven thousand, two hundred twenty-five".