3621901 has 8 divisors (see below), whose sum is σ = 3854520. Its totient is φ = 3391488.

The previous prime is 3621889. The next prime is 3621907. The reversal of 3621901 is 1091263.

It can be written as a sum of positive squares in 4 ways, for example, as 2253001 + 1368900 = 1501^2 + 1170^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3621901 - 2¹⁵ = 3589133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3955 + ... + 4783.

It is an arithmetic number, because the mean of its divisors is an integer number (481815).

Almost surely, 2^3621901 is an apocalyptic number.

It is an amenable number.

3621901 is a deficient number, since it is larger than the sum of its proper divisors (232619).

3621901 is a wasteful number, since it uses less digits than its factorization.

3621901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 3621901 is about 1903.1292651841. The cubic root of 3621901 is about 153.5720535863.

The spelling of 3621901 in words is "three million, six hundred twenty-one thousand, nine hundred one".