7942545 has 24 divisors (see below), whose sum is σ = 14827176. Its totient is φ = 3909888.

The previous prime is 7942537. The next prime is 7942559. The reversal of 7942545 is 5452497.

7942545 is a `hidden beast` number, since 79 + 42 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 6594624 = 1161^2 + 2568^2 .

It is not a de Polignac number, because 7942545 - 2³ = 7942537 is a prime.

It is a Curzon number.

7942545 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6204 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (617799).

Almost surely, 2^7942545 is an apocalyptic number.

It is an amenable number.

7942545 is a deficient number, since it is larger than the sum of its proper divisors (6884631).

7942545 is a wasteful number, since it uses less digits than its factorization.

7942545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13601 (or 13598 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 7942545 is about 2818.2521178915. The cubic root of 7942545 is about 199.5200575307.

It can be divided in two parts, 79 and 42545, that added together give a palindrome (42624).

The spelling of 7942545 in words is "seven million, nine hundred forty-two thousand, five hundred forty-five".