3700002284521 has 9 divisors (see below), whose sum is σ = 3735112689399. Its totient is φ = 3665218928784.

The previous prime is 3700002284509. The next prime is 3700002284567. The reversal of 3700002284521 is 1254822000073.

It is a happy number.

The square root of 3700002284521 is 1923539.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1868483955625 + 1831518328896 = 1366925^2 + 1353336^2 .

It is not a de Polignac number, because 3700002284521 - 2⁷ = 3700002284393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3700002284221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 205809685 + ... + 205827661.

Almost surely, 2^{3700002284521} is an apocalyptic number.

3700002284521 is the 1923539-th square number.

3700002284521 is the 961770-th centered octagonal number.

It is an amenable number.

3700002284521 is a deficient number, since it is larger than the sum of its proper divisors (35110404878).

3700002284521 is an frugal number, since it uses more digits than its factorization.

3700002284521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36168 (or 18084 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

Adding to 3700002284521 its reverse (1254822000073), we get a palindrome (4954824284594).

The spelling of 3700002284521 in words is "three trillion, seven hundred billion, two million, two hundred eighty-four thousand, five hundred twenty-one".