1145242957 has 4 divisors (see below), whose sum is σ = 1145319580. Its totient is φ = 1145166336.

The previous prime is 1145242919. The next prime is 1145242963. The reversal of 1145242957 is 7592425411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 882446436 + 262796521 = 29706^2 + 16211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145242957 - 2²⁷ = 1011025229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145242057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7782 + ... + 48487.

It is an arithmetic number, because the mean of its divisors is an integer number (286329895).

Almost surely, 2^1145242957 is an apocalyptic number.

It is an amenable number.

1145242957 is a deficient number, since it is larger than the sum of its proper divisors (76623).

1145242957 is an equidigital number, since it uses as much as digits as its factorization.

1145242957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76622.

The product of its digits is 100800, while the sum is 40.

The square root of 1145242957 is about 33841.4384593799. The cubic root of 1145242957 is about 1046.2429467476.

The spelling of 1145242957 in words is "one billion, one hundred forty-five million, two hundred forty-two thousand, nine hundred fifty-seven".