4561649 has 4 divisors (see below), whose sum is σ = 4572480. Its totient is φ = 4550820.

The previous prime is 4561639. The next prime is 4561651. The reversal of 4561649 is 9461654.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4561649 - 2⁴ = 4561633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4561639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4757 + ... + 5634.

It is an arithmetic number, because the mean of its divisors is an integer number (1143120).

Almost surely, 2^4561649 is an apocalyptic number.

It is an amenable number.

4561649 is a deficient number, since it is larger than the sum of its proper divisors (10831).

4561649 is a wasteful number, since it uses less digits than its factorization.

4561649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830.

The product of its digits is 25920, while the sum is 35.

The square root of 4561649 is about 2135.8017230071. The cubic root of 4561649 is about 165.8468733561.

The spelling of 4561649 in words is "four million, five hundred sixty-one thousand, six hundred forty-nine".