2453681 has 4 divisors (see below), whose sum is σ = 2532864. Its totient is φ = 2374500.

The previous prime is 2453657. The next prime is 2453687. The reversal of 2453681 is 1863542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2453681 - 2¹⁸ = 2191537 is a prime.

It is a super-2 number, since 2×2453681² = 12041100899522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2453687) 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, 39545 + ... + 39606.

It is an arithmetic number, because the mean of its divisors is an integer number (633216).

2^2453681 is an apocalyptic number.

It is an amenable number.

2453681 is a deficient number, since it is larger than the sum of its proper divisors (79183).

2453681 is an equidigital number, since it uses as much as digits as its factorization.

2453681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79182.

The product of its digits is 5760, while the sum is 29.

The square root of 2453681 is about 1566.4229952347. The cubic root of 2453681 is about 134.8774562408.

The spelling of 2453681 in words is "two million, four hundred fifty-three thousand, six hundred eighty-one".