1142164591 has 4 divisors (see below), whose sum is σ = 1143293112. Its totient is φ = 1141036072.

The previous prime is 1142164571. The next prime is 1142164609. The reversal of 1142164591 is 1954612411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1954612411 = 1373 ⋅1423607.

It is a cyclic number.

It is not a de Polignac number, because 1142164591 - 2²⁹ = 605293679 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 (1142164561) 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, 562741 + ... + 564766.

It is an arithmetic number, because the mean of its divisors is an integer number (285823278).

Almost surely, 2^1142164591 is an apocalyptic number.

1142164591 is a deficient number, since it is larger than the sum of its proper divisors (1128521).

1142164591 is a wasteful number, since it uses less digits than its factorization.

1142164591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128520.

The product of its digits is 8640, while the sum is 34.

The square root of 1142164591 is about 33795.9256568007. The cubic root of 1142164591 is about 1045.3046862291.

The spelling of 1142164591 in words is "one billion, one hundred forty-two million, one hundred sixty-four thousand, five hundred ninety-one".