1157273542 has 4 divisors (see below), whose sum is σ = 1735910316. Its totient is φ = 578636770.

The previous prime is 1157273539. The next prime is 1157273549. The reversal of 1157273542 is 2453727511.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157273549) 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 as a sum of consecutive naturals, namely, 289318384 + ... + 289318387.

It is an arithmetic number, because the mean of its divisors is an integer number (433977579).

Almost surely, 2^1157273542 is an apocalyptic number.

1157273542 is a deficient number, since it is larger than the sum of its proper divisors (578636774).

1157273542 is an equidigital number, since it uses as much as digits as its factorization.

1157273542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578636773.

The product of its digits is 58800, while the sum is 37.

The square root of 1157273542 is about 34018.7234034436. The cubic root of 1157273542 is about 1049.8937283223.

The spelling of 1157273542 in words is "one billion, one hundred fifty-seven million, two hundred seventy-three thousand, five hundred forty-two".