2523861 has 12 divisors (see below), whose sum is σ = 3666988. Its totient is φ = 1672704.

The previous prime is 2523839. The next prime is 2523863. The reversal of 2523861 is 1683252.

It can be written as a sum of positive squares in 2 ways, for example, as 1703025 + 820836 = 1305^2 + 906^2 .

It is not a de Polignac number, because 2523861 - 2¹⁰ = 2522837 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2523863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1011 + ... + 2463.

2^2523861 is an apocalyptic number.

It is an amenable number.

2523861 is a deficient number, since it is larger than the sum of its proper divisors (1143127).

2523861 is a wasteful number, since it uses less digits than its factorization.

2523861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1649 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2523861 is about 1588.6664218772. Note that the first 3 decimals coincide. The cubic root of 2523861 is about 136.1513057960.

The spelling of 2523861 in words is "two million, five hundred twenty-three thousand, eight hundred sixty-one".