3621247 has 12 divisors (see below), whose sum is σ = 4243536. Its totient is φ = 3081120.

The previous prime is 3621239. The next prime is 3621251. The reversal of 3621247 is 7421263.

It is not a de Polignac number, because 3621247 - 2³ = 3621239 is a prime.

It is a super-2 number, since 2×3621247² = 26226859670018, which contains 22 as substring.

It is a Duffinian number.

3621247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12747 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (353628).

Almost surely, 2^3621247 is an apocalyptic number.

3621247 is a deficient number, since it is larger than the sum of its proper divisors (622289).

3621247 is a wasteful number, since it uses less digits than its factorization.

3621247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 551 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 3621247 is about 1902.9574351519. The cubic root of 3621247 is about 153.5628096221.

Adding to 3621247 its product of digits (2016), we get a palindrome (3623263).

The spelling of 3621247 in words is "three million, six hundred twenty-one thousand, two hundred forty-seven".