612121404 has 24 divisors (see below), whose sum is σ = 1503456640. Its totient is φ = 193301424.

The previous prime is 612121403. The next prime is 612121421. The reversal of 612121404 is 404121216.

It is a happy number.

It is a super-3 number, since 3×612121404³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612121403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342144 + ... + 1342599.

Almost surely, 2^612121404 is an apocalyptic number.

It is an amenable number.

612121404 is an abundant number, since it is smaller than the sum of its proper divisors (891335236).

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

612121404 is a wasteful number, since it uses less digits than its factorization.

612121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684769 (or 2684767 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 612121404 is about 24741.0873649482. The cubic root of 612121404 is about 849.0746118187.

The spelling of 612121404 in words is "six hundred twelve million, one hundred twenty-one thousand, four hundred four".