1142736091 has 4 divisors (see below), whose sum is σ = 1305984112. Its totient is φ = 979488072.

The previous prime is 1142736047. The next prime is 1142736149. The reversal of 1142736091 is 1906372411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1906372411 = 23 ⋅82885757.

It is a cyclic number.

It is not a de Polignac number, because 1142736091 - 2⁹ = 1142735579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142736041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81624000 + ... + 81624013.

It is an arithmetic number, because the mean of its divisors is an integer number (326496028).

Almost surely, 2^1142736091 is an apocalyptic number.

1142736091 is a deficient number, since it is larger than the sum of its proper divisors (163248021).

1142736091 is an equidigital number, since it uses as much as digits as its factorization.

1142736091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163248020.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1142736091 is about 33804.3797606168. The cubic root of 1142736091 is about 1045.4790020334.

The spelling of 1142736091 in words is "one billion, one hundred forty-two million, seven hundred thirty-six thousand, ninety-one".