3172661 has 4 divisors (see below), whose sum is σ = 3193824. Its totient is φ = 3151500.

The previous prime is 3172649. The next prime is 3172667. The reversal of 3172661 is 1662713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3172661 - 2¹⁴ = 3156277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3172661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3172667) 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, 10355 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (798456).

Almost surely, 2^3172661 is an apocalyptic number.

It is an amenable number.

3172661 is a deficient number, since it is larger than the sum of its proper divisors (21163).

3172661 is a wasteful number, since it uses less digits than its factorization.

3172661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21162.

The product of its digits is 1512, while the sum is 26.

The square root of 3172661 is about 1781.1965079687. The cubic root of 3172661 is about 146.9404018975.

The spelling of 3172661 in words is "three million, one hundred seventy-two thousand, six hundred sixty-one".