2563240 has 16 divisors (see below), whose sum is σ = 5767380. Its totient is φ = 1025280.

The previous prime is 2563237. The next prime is 2563261. The reversal of 2563240 is 423652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 60516 = 1582^2 + 246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32001 + ... + 32080.

2^2563240 is an apocalyptic number.

2563240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2563240 is an abundant number, since it is smaller than the sum of its proper divisors (3204140).

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

2563240 is a wasteful number, since it uses less digits than its factorization.

2563240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64092 (or 64088 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2563240 is about 1601.0121798412. The cubic root of 2563240 is about 136.8557630923.

Adding to 2563240 its reverse (423652), we get a palindrome (2986892).

The spelling of 2563240 in words is "two million, five hundred sixty-three thousand, two hundred forty".