1142623 has 4 divisors (see below), whose sum is σ = 1144768. Its totient is φ = 1140480.

The previous prime is 1142599. The next prime is 1142633. The reversal of 1142623 is 3262411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142633) 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, 415 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (286192).

2^1142623 is an apocalyptic number.

1142623 is a deficient number, since it is larger than the sum of its proper divisors (2145).

1142623 is an equidigital number, since it uses as much as digits as its factorization.

1142623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144.

The product of its digits is 288, while the sum is 19.

The square root of 1142623 is about 1068.9354517463. The cubic root of 1142623 is about 104.5444512248.

It can be divided in two parts, 11426 and 23, that added together give a square (11449 = 107²).

The spelling of 1142623 in words is "one million, one hundred forty-two thousand, six hundred twenty-three".