2501440 has 28 divisors (see below), whose sum is σ = 5957316. Its totient is φ = 1000448.

The previous prime is 2501417. The next prime is 2501449. The reversal of 2501440 is 441052.

It can be written as a sum of positive squares in 2 ways, for example, as 287296 + 2214144 = 536^2 + 1488^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501449) 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, 3589 + ... + 4228.

2^2501440 is an apocalyptic number.

2501440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2501440 is an abundant number, since it is smaller than the sum of its proper divisors (3455876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2501440 is an equidigital number, since it uses as much as digits as its factorization.

2501440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7834 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2501440 is about 1581.5941325131. The cubic root of 2501440 is about 135.7469342373.

Adding to 2501440 its reverse (441052), we get a palindrome (2942492).

It can be divided in two parts, 250 and 1440, that multiplied together give a square (360000 = 600²).

The spelling of 2501440 in words is "two million, five hundred one thousand, four hundred forty".