4561865 has 48 divisors (see below), whose sum is σ = 7426944. Its totient is φ = 2611200.

The previous prime is 4561859. The next prime is 4561877. The reversal of 4561865 is 5681654.

It is a happy number.

It is not a de Polignac number, because 4561865 - 2⁴ = 4561849 is a prime.

It is a super-2 number, since 2×4561865² = 41621224556450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111245 + ... + 111285.

It is an arithmetic number, because the mean of its divisors is an integer number (154728).

Almost surely, 2^4561865 is an apocalyptic number.

It is an amenable number.

4561865 is a deficient number, since it is larger than the sum of its proper divisors (2865079).

4561865 is a wasteful number, since it uses less digits than its factorization.

4561865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 81 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 4561865 is about 2135.8522889001. The cubic root of 4561865 is about 165.8494910030.

The spelling of 4561865 in words is "four million, five hundred sixty-one thousand, eight hundred sixty-five".