1210042404 has 18 divisors (see below), whose sum is σ = 3058718390. Its totient is φ = 403347456.

The previous prime is 1210042391. The next prime is 1210042423. The reversal of 1210042404 is 4042400121.

It can be written as a sum of positive squares in only one way, i.e., 1207701504 + 2340900 = 34752^2 + 1530^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16806109 + ... + 16806180.

Almost surely, 2^1210042404 is an apocalyptic number.

It is an amenable number.

1210042404 is an abundant number, since it is smaller than the sum of its proper divisors (1848675986).

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

1210042404 is a wasteful number, since it uses less digits than its factorization.

1210042404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33612299 (or 33612294 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1210042404 is about 34785.6637711572. The cubic root of 1210042404 is about 1065.6146844992.

Adding to 1210042404 its reverse (4042400121), we get a palindrome (5252442525).

The spelling of 1210042404 in words is "one billion, two hundred ten million, forty-two thousand, four hundred four".