1251402420352 has 32 divisors (see below), whose sum is σ = 2849175155520. Its totient is φ = 536315322624.

The previous prime is 1251402420349. The next prime is 1251402420379. The reversal of 1251402420352 is 2530242041521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698326348 + ... + 698328139.

It is an arithmetic number, because the mean of its divisors is an integer number (89036723610).

Almost surely, 2^{1251402420352} is an apocalyptic number.

It is an amenable number.

1251402420352 is an abundant number, since it is smaller than the sum of its proper divisors (1597772735168).

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

1251402420352 is an equidigital number, since it uses as much as digits as its factorization.

1251402420352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396654508 (or 1396654496 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1251402420352 its reverse (2530242041521), we get a palindrome (3781644461873).

The spelling of 1251402420352 in words is "one trillion, two hundred fifty-one billion, four hundred two million, four hundred twenty thousand, three hundred fifty-two".