2645381 has 4 divisors (see below), whose sum is σ = 2652672. Its totient is φ = 2638092.

The previous prime is 2645371. The next prime is 2645393. The reversal of 2645381 is 1835462.

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 2645381 - 2¹⁰ = 2644357 is a prime.

It is a super-2 number, since 2×2645381² = 13996081270322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 4⁶ + 5³ + 3⁹ + 8⁷ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645311) 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, 3071 + ... + 3836.

It is an arithmetic number, because the mean of its divisors is an integer number (663168).

2^2645381 is an apocalyptic number.

It is an amenable number.

2645381 is a deficient number, since it is larger than the sum of its proper divisors (7291).

2645381 is an equidigital number, since it uses as much as digits as its factorization.

2645381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290.

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

The square root of 2645381 is about 1626.4627262867. The cubic root of 2645381 is about 138.3023023572.

The spelling of 2645381 in words is "two million, six hundred forty-five thousand, three hundred eighty-one".