1215405401204 has 48 divisors (see below), whose sum is σ = 2205862243200. Its totient is φ = 585266806656.

The previous prime is 1215405401183. The next prime is 1215405401269. The reversal of 1215405401204 is 4021045045121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81252494 + ... + 81267450.

It is an arithmetic number, because the mean of its divisors is an integer number (45955463400).

Almost surely, 2^{1215405401204} is an apocalyptic number.

It is an amenable number.

1215405401204 is a deficient number, since it is larger than the sum of its proper divisors (990456841996).

1215405401204 is a wasteful number, since it uses less digits than its factorization.

1215405401204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712 (or 16710 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 1215405401204 in words is "one trillion, two hundred fifteen billion, four hundred five million, four hundred one thousand, two hundred four".