1242220444 has 6 divisors (see below), whose sum is σ = 2173885784. Its totient is φ = 621110220.

The previous prime is 1242220433. The next prime is 1242220453. The reversal of 1242220444 is 4440222421.

It is a super-2 number, since 2×1242220444² = 3086223262983114272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155277552 + ... + 155277559.

Almost surely, 2^1242220444 is an apocalyptic number.

It is an amenable number.

1242220444 is a deficient number, since it is larger than the sum of its proper divisors (931665340).

1242220444 is a wasteful number, since it uses less digits than its factorization.

1242220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310555115 (or 310555113 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1242220444 is about 35245.1478078898. The cubic root of 1242220444 is about 1074.9779534689.

Adding to 1242220444 its reverse (4440222421), we get a palindrome (5682442865).

The spelling of 1242220444 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, four hundred forty-four".