74642405 has 8 divisors (see below), whose sum is σ = 89855352. Its totient is φ = 59524288.

The previous prime is 74642401. The next prime is 74642413. The reversal of 74642405 is 50424647.

It can be written as a sum of positive squares in 4 ways, for example, as 13082689 + 61559716 = 3617^2 + 7846^2 .

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 74642405 - 2² = 74642401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74642401) 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, 21962 + ... + 25131.

It is an arithmetic number, because the mean of its divisors is an integer number (11231919).

Almost surely, 2^74642405 is an apocalyptic number.

It is an amenable number.

74642405 is a deficient number, since it is larger than the sum of its proper divisors (15212947).

74642405 is a wasteful number, since it uses less digits than its factorization.

74642405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47415.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 74642405 is about 8639.5836126517. The cubic root of 74642405 is about 421.0450261496.

The spelling of 74642405 in words is "seventy-four million, six hundred forty-two thousand, four hundred five".