2142456 has 16 divisors (see below), whose sum is σ = 5356200. Its totient is φ = 714144.

The previous prime is 2142449. The next prime is 2142457. The reversal of 2142456 is 6542412.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 89269 = 2142456 / (2 + 1 + 4 + 2 + 4 + 5 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142457) 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, 44611 + ... + 44658.

2^2142456 is an apocalyptic number.

It is an amenable number.

2142456 is an abundant number, since it is smaller than the sum of its proper divisors (3213744).

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

2142456 is a wasteful number, since it uses less digits than its factorization.

2142456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89278 (or 89274 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 2142456 is about 1463.7130866396. The cubic root of 2142456 is about 128.9151536293.

Adding to 2142456 its reverse (6542412), we get a palindrome (8684868).

The spelling of 2142456 in words is "two million, one hundred forty-two thousand, four hundred fifty-six".