1142811 has 12 divisors (see below), whose sum is σ = 1689688. Its totient is φ = 743904.

The previous prime is 1142809. The next prime is 1142821. The reversal of 1142811 is 1182411.

It is not a de Polignac number, because 1142811 - 2¹ = 1142809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1090 + ... + 1863.

2^1142811 is an apocalyptic number.

1142811 is a deficient number, since it is larger than the sum of its proper divisors (546877).

1142811 is a wasteful number, since it uses less digits than its factorization.

1142811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002 (or 2999 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1142811 is about 1069.0233860866. The cubic root of 1142811 is about 104.5501846058.

It can be divided in two parts, 1142 and 811, that added together give a triangular number (1953 = T₆₂).

The spelling of 1142811 in words is "one million, one hundred forty-two thousand, eight hundred eleven".