74561642 has 16 divisors (see below), whose sum is σ = 113975592. Its totient is φ = 36573120.

The previous prime is 74561633. The next prime is 74561647. The reversal of 74561642 is 24616547.

It can be written as a sum of positive squares in 4 ways, for example, as 31933801 + 42627841 = 5651^2 + 6529^2 .

It is not an unprimeable number, because it can be changed into a prime (74561647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74288 + ... + 75284.

Almost surely, 2^74561642 is an apocalyptic number.

74561642 is a deficient number, since it is larger than the sum of its proper divisors (39413950).

74561642 is a wasteful number, since it uses less digits than its factorization.

74561642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673.

The product of its digits is 40320, while the sum is 35.

The square root of 74561642 is about 8634.9083376721. The cubic root of 74561642 is about 420.8931145956.

The spelling of 74561642 in words is "seventy-four million, five hundred sixty-one thousand, six hundred forty-two".