74187641 has 18 divisors (see below), whose sum is σ = 83466810. Its totient is φ = 65882080.

The previous prime is 74187629. The next prime is 74187649. The reversal of 74187641 is 14678147.

It can be written as a sum of positive squares in only one way, i.e., 53348416 + 20839225 = 7304^2 + 4565^2 .

It is not a de Polignac number, because 74187641 - 2¹⁴ = 74171257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74187595 and 74187604.

It is not an unprimeable number, because it can be changed into a prime (74187649) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 833525 + ... + 833613.

It is an arithmetic number, because the mean of its divisors is an integer number (4637045).

Almost surely, 2^74187641 is an apocalyptic number.

It is an amenable number.

74187641 is a deficient number, since it is larger than the sum of its proper divisors (9279169).

74187641 is an equidigital number, since it uses as much as digits as its factorization.

74187641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 183 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 74187641 is about 8613.2247735677. The cubic root of 74187641 is about 420.1882017465.

The spelling of 74187641 in words is "seventy-four million, one hundred eighty-seven thousand, six hundred forty-one".