2553021 has 6 divisors (see below), whose sum is σ = 3687710. Its totient is φ = 1702008.

The previous prime is 2553017. The next prime is 2553041. The reversal of 2553021 is 1203552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 632025 = 1386^2 + 795^2 .

It is not a de Polignac number, because 2553021 - 2² = 2553017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2552985 and 2553003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141826 + ... + 141843.

2^2553021 is an apocalyptic number.

It is an amenable number.

2553021 is a deficient number, since it is larger than the sum of its proper divisors (1134689).

2553021 is a wasteful number, since it uses less digits than its factorization.

2553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283675 (or 283672 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2553021 is about 1597.8175740678. The cubic root of 2553021 is about 136.6736509089.

Adding to 2553021 its reverse (1203552), we get a palindrome (3756573).

It can be divided in two parts, 25530 and 21, that multiplied together give a triangular number (536130 = T₁₀₃₅).

The spelling of 2553021 in words is "two million, five hundred fifty-three thousand, twenty-one".