4551961 has 4 divisors (see below), whose sum is σ = 4556800. Its totient is φ = 4547124.

The previous prime is 4551929. The next prime is 4551973. The reversal of 4551961 is 1691554.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1691554 = 2 ⋅845777.

It is a cyclic number.

It is not a de Polignac number, because 4551961 - 2⁵ = 4551929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4551061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (1139200).

Almost surely, 2^4551961 is an apocalyptic number.

It is an amenable number.

4551961 is a deficient number, since it is larger than the sum of its proper divisors (4839).

4551961 is a wasteful number, since it uses less digits than its factorization.

4551961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838.

The product of its digits is 5400, while the sum is 31.

The square root of 4551961 is about 2133.5325167431. The cubic root of 4551961 is about 165.7293819765.

The spelling of 4551961 in words is "four million, five hundred fifty-one thousand, nine hundred sixty-one".