74522521 has 2 divisors, whose sum is σ = 74522522. Its totient is φ = 74522520.

The previous prime is 74522471. The next prime is 74522557. The reversal of 74522521 is 12522547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 34339600 = 6339^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 74522521 - 2¹⁹ = 73998233 is a prime.

It is a super-2 number, since 2×74522521² = 11107212272390882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74522521.

It is not a weakly prime, because it can be changed into another prime (74522821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37261260 + 37261261.

It is an arithmetic number, because the mean of its divisors is an integer number (37261261).

Almost surely, 2^74522521 is an apocalyptic number.

It is an amenable number.

74522521 is a deficient number, since it is larger than the sum of its proper divisors (1).

74522521 is an equidigital number, since it uses as much as digits as its factorization.

74522521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 28.

The square root of 74522521 is about 8632.6427587385. The cubic root of 74522521 is about 420.8194903222.

It can be divided in two parts, 7 and 4522521, that added together give a triangular number (4522528 = T₃₀₀₇).

The spelling of 74522521 in words is "seventy-four million, five hundred twenty-two thousand, five hundred twenty-one".