3642551 has 4 divisors (see below), whose sum is σ = 3973704. Its totient is φ = 3311400.

The previous prime is 3642497. The next prime is 3642559. The reversal of 3642551 is 1552463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3642551 - 2¹⁸ = 3380407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3642551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165560 + ... + 165581.

It is an arithmetic number, because the mean of its divisors is an integer number (993426).

Almost surely, 2^3642551 is an apocalyptic number.

3642551 is a deficient number, since it is larger than the sum of its proper divisors (331153).

3642551 is a wasteful number, since it uses less digits than its factorization.

3642551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331152.

The product of its digits is 3600, while the sum is 26.

The square root of 3642551 is about 1908.5468293966. The cubic root of 3642551 is about 153.8633605562.

The spelling of 3642551 in words is "three million, six hundred forty-two thousand, five hundred fifty-one".