3744612521 has 8 divisors (see below), whose sum is σ = 4035200904. Its totient is φ = 3454387200.

The previous prime is 3744612503. The next prime is 3744612523. The reversal of 3744612521 is 1252164473.

It can be written as a sum of positive squares in 4 ways, for example, as 1932833296 + 1811779225 = 43964^2 + 42565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3744612521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3744612523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69146 + ... + 110771.

It is an arithmetic number, because the mean of its divisors is an integer number (504400113).

Almost surely, 2^3744612521 is an apocalyptic number.

It is an amenable number.

3744612521 is a deficient number, since it is larger than the sum of its proper divisors (290588383).

3744612521 is a wasteful number, since it uses less digits than its factorization.

3744612521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181531.

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

The square root of 3744612521 is about 61193.2391772163. The cubic root of 3744612521 is about 1552.8718897361.

Adding to 3744612521 its reverse (1252164473), we get a palindrome (4996776994).

The spelling of 3744612521 in words is "three billion, seven hundred forty-four million, six hundred twelve thousand, five hundred twenty-one".