5421645 has 24 divisors (see below), whose sum is σ = 9458592. Its totient is φ = 2872800.

The previous prime is 5421641. The next prime is 5421649. The reversal of 5421645 is 5461245.

It is an interprime number because it is at equal distance from previous prime (5421641) and next prime (5421649).

It is not a de Polignac number, because 5421645 - 2² = 5421641 is a prime.

It is a super-3 number, since 3×5421645³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9210 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (394108).

Almost surely, 2^5421645 is an apocalyptic number.

It is an amenable number.

5421645 is a deficient number, since it is larger than the sum of its proper divisors (4036947).

5421645 is a wasteful number, since it uses less digits than its factorization.

5421645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 790 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 5421645 is about 2328.4426125632. The cubic root of 5421645 is about 175.6751605476.

It can be divided in two parts, 542 and 1645, that added together give a 7-th power (2187 = 3⁷).

The spelling of 5421645 in words is "five million, four hundred twenty-one thousand, six hundred forty-five".