7121404 has 6 divisors (see below), whose sum is σ = 12462464. Its totient is φ = 3560700.

The previous prime is 7121399. The next prime is 7121407. The reversal of 7121404 is 4041217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890172 + ... + 890179.

Almost surely, 2^7121404 is an apocalyptic number.

It is an amenable number.

7121404 is a deficient number, since it is larger than the sum of its proper divisors (5341060).

7121404 is a wasteful number, since it uses less digits than its factorization.

7121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780355 (or 1780353 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 7121404 is about 2668.5958854799. The cubic root of 7121404 is about 192.3926786950.

It can be divided in two parts, 712 and 1404, that added together give a square (2116 = 46²).

The spelling of 7121404 in words is "seven million, one hundred twenty-one thousand, four hundred four".