1252512230440 has 16 divisors (see below), whose sum is σ = 2818152518580. Its totient is φ = 501004892160.

The previous prime is 1252512230423. The next prime is 1252512230461. The reversal of 1252512230440 is 440322152521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1239361186756 + 13151043684 = 1113266^2 + 114678^2 .

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, 15656402841 + ... + 15656402920.

Almost surely, 2^{1252512230440} is an apocalyptic number.

1252512230440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252512230440 is an abundant number, since it is smaller than the sum of its proper divisors (1565640288140).

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

1252512230440 is a wasteful number, since it uses less digits than its factorization.

1252512230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31312805772 (or 31312805768 counting only the distinct ones).

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

Adding to 1252512230440 its reverse (440322152521), we get a palindrome (1692834382961).

The spelling of 1252512230440 in words is "one trillion, two hundred fifty-two billion, five hundred twelve million, two hundred thirty thousand, four hundred forty".