1231420444 has 24 divisors (see below), whose sum is σ = 2200903488. Its totient is φ = 602646720.

The previous prime is 1231420387. The next prime is 1231420499. The reversal of 1231420444 is 4440241321.

It is a super-3 number, since 3×1231420444³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84634 + ... + 98110.

It is an arithmetic number, because the mean of its divisors is an integer number (91704312).

Almost surely, 2^1231420444 is an apocalyptic number.

It is an amenable number.

1231420444 is a deficient number, since it is larger than the sum of its proper divisors (969483044).

1231420444 is a wasteful number, since it uses less digits than its factorization.

1231420444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13965 (or 13963 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1231420444 is about 35091.6007614358. The cubic root of 1231420444 is about 1071.8535560982.

Adding to 1231420444 its reverse (4440241321), we get a palindrome (5671661765).

The spelling of 1231420444 in words is "one billion, two hundred thirty-one million, four hundred twenty thousand, four hundred forty-four".