1224697961 has 4 divisors (see below), whose sum is σ = 1226850900. Its totient is φ = 1222545024.

The previous prime is 1224697931. The next prime is 1224697963. The reversal of 1224697961 is 1697964221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1697964221 = 1741 ⋅975281.

It can be written as a sum of positive squares in 2 ways, for example, as 710542336 + 514155625 = 26656^2 + 22675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224697961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224697963) 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, 1075616 + ... + 1076753.

It is an arithmetic number, because the mean of its divisors is an integer number (306712725).

Almost surely, 2^1224697961 is an apocalyptic number.

It is an amenable number.

1224697961 is a deficient number, since it is larger than the sum of its proper divisors (2152939).

1224697961 is an equidigital number, since it uses as much as digits as its factorization.

1224697961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152938.

The product of its digits is 326592, while the sum is 47.

The square root of 1224697961 is about 34995.6848911405. The cubic root of 1224697961 is about 1069.8995337587.

The spelling of 1224697961 in words is "one billion, two hundred twenty-four million, six hundred ninety-seven thousand, nine hundred sixty-one".