5651845 has 4 divisors (see below), whose sum is σ = 6782220. Its totient is φ = 4521472.

The previous prime is 5651831. The next prime is 5651851. The reversal of 5651845 is 5481565.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4435236 + 1216609 = 2106^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 5651845 - 2⁷ = 5651717 is a prime.

5651845 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5651845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565180 + ... + 565189.

It is an arithmetic number, because the mean of its divisors is an integer number (1695555).

Almost surely, 2^5651845 is an apocalyptic number.

It is an amenable number.

5651845 is a deficient number, since it is larger than the sum of its proper divisors (1130375).

5651845 is a wasteful number, since it uses less digits than its factorization.

5651845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130374.

The product of its digits is 24000, while the sum is 34.

The square root of 5651845 is about 2377.3609317897. The cubic root of 5651845 is about 178.1271342722.

The spelling of 5651845 in words is "five million, six hundred fifty-one thousand, eight hundred forty-five".