74527561 has 4 divisors (see below), whose sum is σ = 75790800. Its totient is φ = 73264324.

The previous prime is 74527559. The next prime is 74527601. The reversal of 74527561 is 16572547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16572547 = 97 ⋅170851.

It is a cyclic number.

It is not a de Polignac number, because 74527561 - 2¹ = 74527559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74527561.

It is not an unprimeable number, because it can be changed into a prime (74527501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631531 + ... + 631648.

It is an arithmetic number, because the mean of its divisors is an integer number (18947700).

Almost surely, 2^74527561 is an apocalyptic number.

It is an amenable number.

74527561 is a deficient number, since it is larger than the sum of its proper divisors (1263239).

74527561 is a wasteful number, since it uses less digits than its factorization.

74527561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263238.

The product of its digits is 58800, while the sum is 37.

The square root of 74527561 is about 8632.9346690451. The cubic root of 74527561 is about 420.8289768613.

The spelling of 74527561 in words is "seventy-four million, five hundred twenty-seven thousand, five hundred sixty-one".