2451240 has 96 divisors (see below), whose sum is σ = 8704800. Its totient is φ = 593280.

The previous prime is 2451233. The next prime is 2451257. The reversal of 2451240 is 421542.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3651 + ... + 4269.

It is an arithmetic number, because the mean of its divisors is an integer number (90675).

2^2451240 is an apocalyptic number.

2451240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2451240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4352400).

2451240 is an abundant number, since it is smaller than the sum of its proper divisors (6253560).

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

2451240 is a wasteful number, since it uses less digits than its factorization.

2451240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2451240 is about 1565.6436376136. The cubic root of 2451240 is about 134.8327146044.

Adding to 2451240 its reverse (421542), we get a palindrome (2872782).

It can be divided in two parts, 245 and 1240, that added together give a triangular number (1485 = T₅₄).

The spelling of 2451240 in words is "two million, four hundred fifty-one thousand, two hundred forty".