5640451 has 8 divisors (see below), whose sum is σ = 5935104. Its totient is φ = 5349960.

The previous prime is 5640449. The next prime is 5640457. The reversal of 5640451 is 1540465.

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

It is a cyclic number.

It is not a de Polignac number, because 5640451 - 2¹ = 5640449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5640457) 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, 1956 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (741888).

Almost surely, 2^5640451 is an apocalyptic number.

5640451 is a deficient number, since it is larger than the sum of its proper divisors (294653).

5640451 is a wasteful number, since it uses less digits than its factorization.

5640451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 5640451 is about 2374.9633681385. The cubic root of 5640451 is about 178.0073535657.

It can be divided in two parts, 5640 and 451, that multiplied together give a triangular number (2543640 = T₂₂₅₅).

The spelling of 5640451 in words is "five million, six hundred forty thousand, four hundred fifty-one".