1252405432 has 8 divisors (see below), whose sum is σ = 2348260200. Its totient is φ = 626202712.

The previous prime is 1252405421. The next prime is 1252405433. The reversal of 1252405432 is 2345042521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1252405432² = 3137038732206213248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252405432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252405433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78275332 + ... + 78275347.

It is an arithmetic number, because the mean of its divisors is an integer number (293532525).

Almost surely, 2^1252405432 is an apocalyptic number.

It is an amenable number.

1252405432 is a deficient number, since it is larger than the sum of its proper divisors (1095854768).

1252405432 is a wasteful number, since it uses less digits than its factorization.

1252405432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156550685 (or 156550681 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1252405432 is about 35389.3406550617. The cubic root of 1252405432 is about 1077.9078817474.

Adding to 1252405432 its reverse (2345042521), we get a palindrome (3597447953).

The spelling of 1252405432 in words is "one billion, two hundred fifty-two million, four hundred five thousand, four hundred thirty-two".