1142157099 has 16 divisors (see below), whose sum is σ = 1559828864. Its totient is φ = 742996800.

The previous prime is 1142157091. The next prime is 1142157143. The reversal of 1142157099 is 9907512411.

It is not a de Polignac number, because 1142157099 - 2³ = 1142157091 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142157091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147279 + ... + 154839.

It is an arithmetic number, because the mean of its divisors is an integer number (97489304).

Almost surely, 2^1142157099 is an apocalyptic number.

1142157099 is a deficient number, since it is larger than the sum of its proper divisors (417671765).

1142157099 is a wasteful number, since it uses less digits than its factorization.

1142157099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1142157099 is about 33795.8148148554. The cubic root of 1142157099 is about 1045.3024006742.

The spelling of 1142157099 in words is "one billion, one hundred forty-two million, one hundred fifty-seven thousand, ninety-nine".