2131456 has 40 divisors (see below), whose sum is σ = 4468464. Its totient is φ = 1013760.

The previous prime is 2131447. The next prime is 2131457. The reversal of 2131456 is 6541312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131457) 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, 11686 + ... + 11866.

2^2131456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234232).

2131456 is an abundant number, since it is smaller than the sum of its proper divisors (2337008).

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

2131456 is an equidigital number, since it uses as much as digits as its factorization.

2131456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 206 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 2131456 is about 1459.9506840986. The cubic root of 2131456 is about 128.6941455027.

Adding to 2131456 its reverse (6541312), we get a palindrome (8672768).

The spelling of 2131456 in words is "two million, one hundred thirty-one thousand, four hundred fifty-six".