2403261 has 24 divisors (see below), whose sum is σ = 4078464. Its totient is φ = 1334880.

The previous prime is 2403229. The next prime is 2403263. The reversal of 2403261 is 1623042.

It is a happy number.

2403261 is a `hidden beast` number, since 2 + 403 + 261 = 666.

It is not a de Polignac number, because 2403261 - 2⁵ = 2403229 is a prime.

It is a Curzon number.

2403261 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1816 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (169936).

2^2403261 is an apocalyptic number.

2403261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2403261 is a deficient number, since it is larger than the sum of its proper divisors (1675203).

2403261 is a wasteful number, since it uses less digits than its factorization.

2403261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2403261 is about 1550.2454644346. The cubic root of 2403261 is about 133.9472020406.

The spelling of 2403261 in words is "two million, four hundred three thousand, two hundred sixty-one".