3651642 has 20 divisors (see below), whose sum is σ = 8182746. Its totient is φ = 1217160.

The previous prime is 3651623. The next prime is 3651653. The reversal of 3651642 is 2461563.

3651642 is a `hidden beast` number, since 3 + 651 + 6 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2653641 + 998001 = 1629^2 + 999^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11109 + ... + 11432.

Almost surely, 2^3651642 is an apocalyptic number.

3651642 is an abundant number, since it is smaller than the sum of its proper divisors (4531104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3651642 is a wasteful number, since it uses less digits than its factorization.

3651642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22555 (or 22546 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 3651642 is about 1910.9270001756. The cubic root of 3651642 is about 153.9912571638.

The spelling of 3651642 in words is "three million, six hundred fifty-one thousand, six hundred forty-two".