4791561 has 4 divisors (see below), whose sum is σ = 6388752. Its totient is φ = 3194372.

The previous prime is 4791559. The next prime is 4791623. The reversal of 4791561 is 1651974.

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 4791561 - 2¹ = 4791559 is a prime.

It is an Ulam number.

It is a D-number.

4791561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4791511) 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, 798591 + ... + 798596.

It is an arithmetic number, because the mean of its divisors is an integer number (1597188).

Almost surely, 2^4791561 is an apocalyptic number.

It is an amenable number.

4791561 is a deficient number, since it is larger than the sum of its proper divisors (1597191).

4791561 is a wasteful number, since it uses less digits than its factorization.

4791561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597190.

The product of its digits is 7560, while the sum is 33.

The square root of 4791561 is about 2188.9634533267. The cubic root of 4791561 is about 168.5876177322.

The spelling of 4791561 in words is "four million, seven hundred ninety-one thousand, five hundred sixty-one".