7942505 has 8 divisors (see below), whose sum is σ = 9687624. Its totient is φ = 6249600.

The previous prime is 7942499. The next prime is 7942507. The reversal of 7942505 is 5052497.

It can be written as a sum of positive squares in 4 ways, for example, as 614656 + 7327849 = 784^2 + 2707^2 .

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

It is not a de Polignac number, because 7942505 - 2¹⁰ = 7941481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7942507) 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, 12716 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (1210953).

Almost surely, 2^7942505 is an apocalyptic number.

It is an amenable number.

7942505 is a deficient number, since it is larger than the sum of its proper divisors (1745119).

7942505 is a wasteful number, since it uses less digits than its factorization.

7942505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26107.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 7942505 is about 2818.2450212854. The cubic root of 7942505 is about 199.5197225913.

The spelling of 7942505 in words is "seven million, nine hundred forty-two thousand, five hundred five".