1142723 has 4 divisors (see below), whose sum is σ = 1209960. Its totient is φ = 1075488.

The previous prime is 1142707. The next prime is 1142737. The reversal of 1142723 is 3272411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3272411 = 523 ⋅6257.

It is not a de Polignac number, because 1142723 - 2⁴ = 1142707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142695 and 1142704.

It is not an unprimeable number, because it can be changed into a prime (1142773) 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, 33593 + ... + 33626.

It is an arithmetic number, because the mean of its divisors is an integer number (302490).

2^1142723 is an apocalyptic number.

1142723 is a deficient number, since it is larger than the sum of its proper divisors (67237).

1142723 is an equidigital number, since it uses as much as digits as its factorization.

1142723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67236.

The product of its digits is 336, while the sum is 20.

The square root of 1142723 is about 1068.9822262320. The cubic root of 1142723 is about 104.5475009739.

The spelling of 1142723 in words is "one million, one hundred forty-two thousand, seven hundred twenty-three".