1217024961 has 4 divisors (see below), whose sum is σ = 1622699952. Its totient is φ = 811349972.

The previous prime is 1217024947. The next prime is 1217024971. The reversal of 1217024961 is 1694207121.

It is a happy number.

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 1217024961 - 2⁵ = 1217024929 is a prime.

It is a super-2 number, since 2×1217024961² = 2962299511394103042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1217024971) 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, 202837491 + ... + 202837496.

It is an arithmetic number, because the mean of its divisors is an integer number (405674988).

Almost surely, 2^1217024961 is an apocalyptic number.

It is an amenable number.

1217024961 is a deficient number, since it is larger than the sum of its proper divisors (405674991).

1217024961 is an equidigital number, since it uses as much as digits as its factorization.

1217024961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405674990.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1217024961 is about 34885.8848390004. The cubic root of 1217024961 is about 1067.6604664559.

The spelling of 1217024961 in words is "one billion, two hundred seventeen million, twenty-four thousand, nine hundred sixty-one".