1220542404 has 24 divisors (see below), whose sum is σ = 3015458208. Its totient is φ = 382915200.

The previous prime is 1220542397. The next prime is 1220542423. The reversal of 1220542404 is 4042450221.

It is a happy 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, 2991322 + ... + 2991729.

It is an arithmetic number, because the mean of its divisors is an integer number (125644092).

Almost surely, 2^1220542404 is an apocalyptic number.

It is an amenable number.

1220542404 is an abundant number, since it is smaller than the sum of its proper divisors (1794915804).

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

1220542404 is a wasteful number, since it uses less digits than its factorization.

1220542404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983075 (or 5983073 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1220542404 is about 34936.2620210005. The cubic root of 1220542404 is about 1068.6880604574.

Adding to 1220542404 its reverse (4042450221), we get a palindrome (5262992625).

The spelling of 1220542404 in words is "one billion, two hundred twenty million, five hundred forty-two thousand, four hundred four".