1157242065 has 24 divisors (see below), whose sum is σ = 2153888640. Its totient is φ = 529024608.

The previous prime is 1157242061. The next prime is 1157242103. The reversal of 1157242065 is 5602427511.

It is not a de Polignac number, because 1157242065 - 2² = 1157242061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157242061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786505 + ... + 787974.

It is an arithmetic number, because the mean of its divisors is an integer number (89745360).

Almost surely, 2^1157242065 is an apocalyptic number.

1157242065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1157242065 is a deficient number, since it is larger than the sum of its proper divisors (996646575).

1157242065 is a wasteful number, since it uses less digits than its factorization.

1157242065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574501 (or 1574494 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1157242065 is about 34018.2607580105. The cubic root of 1157242065 is about 1049.8842094537.

Adding to 1157242065 its reverse (5602427511), we get a palindrome (6759669576).

The spelling of 1157242065 in words is "one billion, one hundred fifty-seven million, two hundred forty-two thousand, sixty-five".