1157344217 has 4 divisors (see below), whose sum is σ = 1157841360. Its totient is φ = 1156847076.

The previous prime is 1157344157. The next prime is 1157344219. The reversal of 1157344217 is 7124437511.

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 an emirpimes, since its reverse is a distinct semiprime: 7124437511 = 29 ⋅245670259.

It is a cyclic number.

It is not a de Polignac number, because 1157344217 - 2⁸ = 1157343961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157344219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245063 + ... + 249740.

It is an arithmetic number, because the mean of its divisors is an integer number (289460340).

Almost surely, 2^1157344217 is an apocalyptic number.

It is an amenable number.

1157344217 is a deficient number, since it is larger than the sum of its proper divisors (497143).

1157344217 is an equidigital number, since it uses as much as digits as its factorization.

1157344217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497142.

The product of its digits is 23520, while the sum is 35.

The square root of 1157344217 is about 34019.7621537835. The cubic root of 1157344217 is about 1049.9151003161.

The spelling of 1157344217 in words is "one billion, one hundred fifty-seven million, three hundred forty-four thousand, two hundred seventeen".