74542545 has 128 divisors (see below), whose sum is σ = 169205760. Its totient is φ = 30240000.

The previous prime is 74542519. The next prime is 74542553. The reversal of 74542545 is 54524547.

It is a happy number.

74542545 is a `hidden beast` number, since 74 + 5 + 42 + 545 = 666.

It is not a de Polignac number, because 74542545 - 2¹⁵ = 74509777 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 737995 + ... + 738095.

It is an arithmetic number, because the mean of its divisors is an integer number (1321920).

Almost surely, 2^74542545 is an apocalyptic number.

It is an amenable number.

74542545 is an abundant number, since it is smaller than the sum of its proper divisors (94663215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74542545 is a wasteful number, since it uses less digits than its factorization.

74542545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 198 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 74542545 is about 8633.8024647313. The cubic root of 74542545 is about 420.8571779669.

It can be divided in two parts, 7454 and 2545, that added together give a palindrome (9999).

The spelling of 74542545 in words is "seventy-four million, five hundred forty-two thousand, five hundred forty-five".