1542889 has 2 divisors, whose sum is σ = 1542890. Its totient is φ = 1542888.

The previous prime is 1542881. The next prime is 1542899. The reversal of 1542889 is 9882451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870489 + 672400 = 933^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542889 - 2³ = 1542881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771444 + 771445.

It is an arithmetic number, because the mean of its divisors is an integer number (771445).

2^1542889 is an apocalyptic number.

It is an amenable number.

1542889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542889 is an equidigital number, since it uses as much as digits as its factorization.

1542889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

The square root of 1542889 is about 1242.1308304684. The cubic root of 1542889 is about 115.5522024353.

The spelling of 1542889 in words is "one million, five hundred forty-two thousand, eight hundred eighty-nine".