1252513401444 has 72 divisors (see below), whose sum is σ = 3223463039160. Its totient is φ = 409986842112.

The previous prime is 1252513401431. The next prime is 1252513401467. The reversal of 1252513401444 is 4441043152521.

1252513401444 is a `hidden beast` number, since 1 + 2 + 52 + 513 + 40 + 14 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 545955476544 + 706557924900 = 738888^2 + 840570^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1252513401399 and 1252513401408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438807 + ... + 1642430.

Almost surely, 2^{1252513401444} is an apocalyptic number.

It is an amenable number.

1252513401444 is an abundant number, since it is smaller than the sum of its proper divisors (1970949637716).

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

1252513401444 is a wasteful number, since it uses less digits than its factorization.

1252513401444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081549 (or 2081544 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 1252513401444 its reverse (4441043152521), we get a palindrome (5693556553965).

The spelling of 1252513401444 in words is "one trillion, two hundred fifty-two billion, five hundred thirteen million, four hundred one thousand, four hundred forty-four".