2172402 has 12 divisors (see below), whose sum is σ = 4706910. Its totient is φ = 724128.

The previous prime is 2172397. The next prime is 2172427. The reversal of 2172402 is 2042712.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 531441 = 1281^2 + 729^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 120689 = 2172402 / (2 + 1 + 7 + 2 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60327 + ... + 60362.

2^2172402 is an apocalyptic number.

2172402 is an abundant number, since it is smaller than the sum of its proper divisors (2534508).

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

2172402 is a wasteful number, since it uses less digits than its factorization.

2172402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120697 (or 120694 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2172402 is about 1473.9070527004. The cubic root of 2172402 is about 129.5130103256.

The spelling of 2172402 in words is "two million, one hundred seventy-two thousand, four hundred two".