7912405 has 8 divisors (see below), whose sum is σ = 9516600. Its totient is φ = 6315456.

The previous prime is 7912363. The next prime is 7912433. The reversal of 7912405 is 5042197.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 762129 + 7150276 = 873^2 + 2674^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7912405 - 2⁷ = 7912277 is a prime.

It is a congruent 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, 991 + ... + 4099.

It is an arithmetic number, because the mean of its divisors is an integer number (1189575).

Almost surely, 2^7912405 is an apocalyptic number.

It is an amenable number.

7912405 is a deficient number, since it is larger than the sum of its proper divisors (1604195).

7912405 is a wasteful number, since it uses less digits than its factorization.

7912405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 7912405 is about 2812.8997493690. The cubic root of 7912405 is about 199.2673611453.

The spelling of 7912405 in words is "seven million, nine hundred twelve thousand, four hundred five".