2645421 has 8 divisors (see below), whose sum is σ = 3734784. Its totient is φ = 1659840.

The previous prime is 2645417. The next prime is 2645429. The reversal of 2645421 is 1245462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2645421 - 2² = 2645417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2645391 and 2645400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25885 + ... + 25986.

It is an arithmetic number, because the mean of its divisors is an integer number (466848).

2^2645421 is an apocalyptic number.

It is an amenable number.

2645421 is a deficient number, since it is larger than the sum of its proper divisors (1089363).

2645421 is a wasteful number, since it uses less digits than its factorization.

2645421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51891.

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

The square root of 2645421 is about 1626.4750228639. The cubic root of 2645421 is about 138.3029994294.

The spelling of 2645421 in words is "two million, six hundred forty-five thousand, four hundred twenty-one".