1243231402 has 16 divisors (see below), whose sum is σ = 2132266752. Its totient is φ = 532560240.

The previous prime is 1243231393. The next prime is 1243231411. The reversal of 1243231402 is 2041323421.

It is an interprime number because it is at equal distance from previous prime (1243231393) and next prime (1243231411).

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 11103 + ... + 51085.

It is an arithmetic number, because the mean of its divisors is an integer number (133266672).

Almost surely, 2^1243231402 is an apocalyptic number.

1243231402 is a deficient number, since it is larger than the sum of its proper divisors (889035350).

1243231402 is a wasteful number, since it uses less digits than its factorization.

1243231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42213.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1243231402 is about 35259.4866950726. The cubic root of 1243231402 is about 1075.2694913324.

Adding to 1243231402 its reverse (2041323421), we get a palindrome (3284554823).

It can be divided in two parts, 12432 and 31402, that added together give a palindrome (43834).

The spelling of 1243231402 in words is "one billion, two hundred forty-three million, two hundred thirty-one thousand, four hundred two".