2145253 has 4 divisors (see below), whose sum is σ = 2340288. Its totient is φ = 1950220.

The previous prime is 2145239. The next prime is 2145263. The reversal of 2145253 is 3525412.

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 a de Polignac number, because none of the positive numbers 2^k-2145253 is a prime.

It is a super-2 number, since 2×2145253² = 9204220868018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145263) 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, 97501 + ... + 97522.

It is an arithmetic number, because the mean of its divisors is an integer number (585072).

2^2145253 is an apocalyptic number.

It is an amenable number.

2145253 is a deficient number, since it is larger than the sum of its proper divisors (195035).

2145253 is a wasteful number, since it uses less digits than its factorization.

2145253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195034.

The product of its digits is 1200, while the sum is 22.

The square root of 2145253 is about 1464.6682218168. The cubic root of 2145253 is about 128.9712292868.

The spelling of 2145253 in words is "two million, one hundred forty-five thousand, two hundred fifty-three".