1225036543257 has 24 divisors (see below), whose sum is σ = 1832096284928. Its totient is φ = 787958344800.

The previous prime is 1225036543253. The next prime is 1225036543331. The reversal of 1225036543257 is 7523456305221.

1225036543257 is a `hidden beast` number, since 1 + 2 + 2 + 50 + 3 + 6 + 543 + 2 + 57 = 666.

It is not a de Polignac number, because 1225036543257 - 2² = 1225036543253 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225036543253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6540298 + ... + 6724995.

Almost surely, 2^{1225036543257} is an apocalyptic number.

It is an amenable number.

1225036543257 is a deficient number, since it is larger than the sum of its proper divisors (607059741671).

1225036543257 is a wasteful number, since it uses less digits than its factorization.

1225036543257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265661 (or 13265658 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

The spelling of 1225036543257 in words is "one trillion, two hundred twenty-five billion, thirty-six million, five hundred forty-three thousand, two hundred fifty-seven".