3621537 has 16 divisors (see below), whose sum is σ = 5417280. Its totient is φ = 2390976.

The previous prime is 3621529. The next prime is 3621559. The reversal of 3621537 is 7351263.

It is a happy number.

3621537 is a `hidden beast` number, since 3 + 621 + 5 + 37 = 666.

It is not a de Polignac number, because 3621537 - 2³ = 3621529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 3621537.

It is not an unprimeable number, because it can be changed into a prime (3621517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2458 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (338580).

Almost surely, 2^3621537 is an apocalyptic number.

It is an amenable number.

3621537 is a deficient number, since it is larger than the sum of its proper divisors (1795743).

3621537 is a wasteful number, since it uses less digits than its factorization.

3621537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1303 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 3621537 is about 1903.0336308116. The cubic root of 3621537 is about 153.5669087650.

The spelling of 3621537 in words is "three million, six hundred twenty-one thousand, five hundred thirty-seven".