2136481 has 4 divisors (see below), whose sum is σ = 2142000. Its totient is φ = 2130964.

The previous prime is 2136473. The next prime is 2136487. The reversal of 2136481 is 1846312.

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 2136481 - 2³ = 2136473 is a prime.

It is a super-2 number, since 2×2136481² = 9129102126722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136487) 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, 2131 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (535500).

2^2136481 is an apocalyptic number.

It is an amenable number.

2136481 is a deficient number, since it is larger than the sum of its proper divisors (5519).

2136481 is an equidigital number, since it uses as much as digits as its factorization.

2136481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518.

The product of its digits is 1152, while the sum is 25.

The square root of 2136481 is about 1461.6706195310. The cubic root of 2136481 is about 128.7952001413.

The spelling of 2136481 in words is "two million, one hundred thirty-six thousand, four hundred eighty-one".