1244152402 has 4 divisors (see below), whose sum is σ = 1866228606. Its totient is φ = 622076200.

The previous prime is 1244152397. The next prime is 1244152447. The reversal of 1244152402 is 2042514421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2042514421 = 19 ⋅107500759.

It can be written as a sum of positive squares in only one way, i.e., 692795041 + 551357361 = 26321^2 + 23481^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311038099 + ... + 311038102.

Almost surely, 2^1244152402 is an apocalyptic number.

1244152402 is a deficient number, since it is larger than the sum of its proper divisors (622076204).

1244152402 is an equidigital number, since it uses as much as digits as its factorization.

1244152402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622076203.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1244152402 is about 35272.5445920761. The cubic root of 1244152402 is about 1075.5349497587.

Adding to 1244152402 its reverse (2042514421), we get a palindrome (3286666823).

The spelling of 1244152402 in words is "one billion, two hundred forty-four million, one hundred fifty-two thousand, four hundred two".