2172629 has 4 divisors (see below), whose sum is σ = 2213676. Its totient is φ = 2131584.

The previous prime is 2172619. The next prime is 2172641. The reversal of 2172629 is 9262712.

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

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 1270129 = 950^2 + 1127^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172629 - 2⁴ = 2172613 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 1 + 7 + 2²⁰ + 6² + 2²⁰ + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172619) 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, 20444 + ... + 20549.

It is an arithmetic number, because the mean of its divisors is an integer number (553419).

2^2172629 is an apocalyptic number.

It is an amenable number.

2172629 is a deficient number, since it is larger than the sum of its proper divisors (41047).

2172629 is an equidigital number, since it uses as much as digits as its factorization.

2172629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41046.

The product of its digits is 3024, while the sum is 29.

The square root of 2172629 is about 1473.9840569016. The cubic root of 2172629 is about 129.5175212202.

The spelling of 2172629 in words is "two million, one hundred seventy-two thousand, six hundred twenty-nine".