1142389 has 2 divisors, whose sum is σ = 1142390. Its totient is φ = 1142388.

The previous prime is 1142363. The next prime is 1142423. The reversal of 1142389 is 9832411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887364 + 255025 = 942^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142389 - 2⁵ = 1142357 is a prime.

It is a Chen prime.

1142389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571194 + 571195.

It is an arithmetic number, because the mean of its divisors is an integer number (571195).

2^1142389 is an apocalyptic number.

It is an amenable number.

1142389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142389 is an equidigital number, since it uses as much as digits as its factorization.

1142389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1142389 is about 1068.8259914504. The cubic root of 1142389 is about 104.5373141167.

The spelling of 1142389 in words is "one million, one hundred forty-two thousand, three hundred eighty-nine".