1242220432 has 20 divisors (see below), whose sum is σ = 2511446400. Its totient is φ = 594105248.

The previous prime is 1242220429. The next prime is 1242220433. The reversal of 1242220432 is 2340222421.

It is a super-2 number, since 2×1242220432² = 3086223203356533248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242220433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1687432 + ... + 1688167.

It is an arithmetic number, because the mean of its divisors is an integer number (125572320).

Almost surely, 2^1242220432 is an apocalyptic number.

It is an amenable number.

1242220432 is an abundant number, since it is smaller than the sum of its proper divisors (1269225968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242220432 is a wasteful number, since it uses less digits than its factorization.

1242220432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375630 (or 3375624 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1242220432 is about 35245.1476376536. The cubic root of 1242220432 is about 1074.9779500074.

Adding to 1242220432 its reverse (2340222421), we get a palindrome (3582442853).

The spelling of 1242220432 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, four hundred thirty-two".