74490545 has 12 divisors (see below), whose sum is σ = 94343220. Its totient is φ = 56454624.

The previous prime is 74490541. The next prime is 74490569. The reversal of 74490545 is 54509447.

It can be written as a sum of positive squares in 2 ways, for example, as 9591409 + 64899136 = 3097^2 + 8056^2 .

It is not a de Polignac number, because 74490545 - 2² = 74490541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74490499 and 74490508.

It is not an unprimeable number, because it can be changed into a prime (74490541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 18830 + ... + 22439.

It is an arithmetic number, because the mean of its divisors is an integer number (7861935).

Almost surely, 2^74490545 is an apocalyptic number.

It is an amenable number.

74490545 is a deficient number, since it is larger than the sum of its proper divisors (19852675).

74490545 is a wasteful number, since it uses less digits than its factorization.

74490545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41312 (or 41293 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 74490545 is about 8630.7905199929. The cubic root of 74490545 is about 420.7592935348.

The spelling of 74490545 in words is "seventy-four million, four hundred ninety thousand, five hundred forty-five".