2513421 has 6 divisors (see below), whose sum is σ = 3630510. Its totient is φ = 1675608.

The previous prime is 2513363. The next prime is 2513443. The reversal of 2513421 is 1243152.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 1179396 = 1155^2 + 1086^2 .

It is not a de Polignac number, because 2513421 - 2⁷ = 2513293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2513394 and 2513403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2513461) 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, 139626 + ... + 139643.

It is an arithmetic number, because the mean of its divisors is an integer number (605085).

2^2513421 is an apocalyptic number.

It is an amenable number.

2513421 is a deficient number, since it is larger than the sum of its proper divisors (1117089).

2513421 is a wasteful number, since it uses less digits than its factorization.

2513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279275 (or 279272 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2513421 is about 1585.3772421730. The cubic root of 2513421 is about 135.9633155093.

Adding to 2513421 its reverse (1243152), we get a palindrome (3756573).

The spelling of 2513421 in words is "two million, five hundred thirteen thousand, four hundred twenty-one".