961224491 has 4 divisors (see below), whose sum is σ = 965350152. Its totient is φ = 957098832.

The previous prime is 961224437. The next prime is 961224553. The reversal of 961224491 is 194422169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194422169 = 59 ⋅3295291.

It is a cyclic number.

It is not a de Polignac number, because 961224491 - 2¹⁸ = 960962347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961224431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062481 + ... + 2062946.

It is an arithmetic number, because the mean of its divisors is an integer number (241337538).

Almost surely, 2^961224491 is an apocalyptic number.

961224491 is a deficient number, since it is larger than the sum of its proper divisors (4125661).

961224491 is a wasteful number, since it uses less digits than its factorization.

961224491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125660.

The product of its digits is 31104, while the sum is 38.

The square root of 961224491 is about 31003.6206111480. The cubic root of 961224491 is about 986.9040757662.

The spelling of 961224491 in words is "nine hundred sixty-one million, two hundred twenty-four thousand, four hundred ninety-one".