1220403412 has 48 divisors (see below), whose sum is σ = 2397523968. Its totient is φ = 540725760.

The previous prime is 1220403409. The next prime is 1220403413. The reversal of 1220403412 is 2143040221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220403412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220403413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70173 + ... + 85819.

It is an arithmetic number, because the mean of its divisors is an integer number (49948416).

Almost surely, 2^1220403412 is an apocalyptic number.

It is an amenable number.

1220403412 is a deficient number, since it is larger than the sum of its proper divisors (1177120556).

1220403412 is a wasteful number, since it uses less digits than its factorization.

1220403412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15736 (or 15734 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220403412 is about 34934.2727418219. The cubic root of 1220403412 is about 1068.6474925019.

Adding to 1220403412 its reverse (2143040221), we get a palindrome (3363443633).

The spelling of 1220403412 in words is "one billion, two hundred twenty million, four hundred three thousand, four hundred twelve".