1142591 has 4 divisors (see below), whose sum is σ = 1161384. Its totient is φ = 1123800.

The previous prime is 1142573. The next prime is 1142593. The reversal of 1142591 is 1952411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1952411 = 31 ⋅62981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142591 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 (1142593) 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, 9305 + ... + 9426.

It is an arithmetic number, because the mean of its divisors is an integer number (290346).

2^1142591 is an apocalyptic number.

1142591 is a deficient number, since it is larger than the sum of its proper divisors (18793).

1142591 is an equidigital number, since it uses as much as digits as its factorization.

1142591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18792.

The product of its digits is 360, while the sum is 23.

The square root of 1142591 is about 1068.9204834785. The cubic root of 1142591 is about 104.5434752676.

The spelling of 1142591 in words is "one million, one hundred forty-two thousand, five hundred ninety-one".