1251402542252 has 12 divisors (see below), whose sum is σ = 2191403800656. Its totient is φ = 625287170640.

The previous prime is 1251402542251. The next prime is 1251402542303. The reversal of 1251402542252 is 2522452041521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1251402542251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103518323 + ... + 103530410.

It is an arithmetic number, because the mean of its divisors is an integer number (182616983388).

Almost surely, 2^{1251402542252} is an apocalyptic number.

It is an amenable number.

1251402542252 is a deficient number, since it is larger than the sum of its proper divisors (940001258404).

1251402542252 is a wasteful number, since it uses less digits than its factorization.

1251402542252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207050248 (or 207050246 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 1251402542252 its reverse (2522452041521), we get a palindrome (3773854583773).

The spelling of 1251402542252 in words is "one trillion, two hundred fifty-one billion, four hundred two million, five hundred forty-two thousand, two hundred fifty-two".