394026121225 has 81 divisors (see below), whose sum is σ = 547260422527. Its totient is φ = 281216320000.

The previous prime is 394026121211. The next prime is 394026121243. The reversal of 394026121225 is 522121620493.

The square root of 394026121225 is 627715.

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 276662324169 + 117363797056 = 525987^2 + 342584^2 .

It is not a de Polignac number, because 394026121225 - 2¹⁵ = 394026088457 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, 3486956769 + ... + 3486956881.

Almost surely, 2^394026121225 is an apocalyptic number.

394026121225 is the 627715-th square number.

394026121225 is the 313858-th centered octagonal number.

It is an amenable number.

394026121225 is a deficient number, since it is larger than the sum of its proper divisors (153234301302).

394026121225 is a wasteful number, since it uses less digits than its factorization.

394026121225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 394026121225 in words is "three hundred ninety-four billion, twenty-six million, one hundred twenty-one thousand, two hundred twenty-five".