1542389 has 4 divisors (see below), whose sum is σ = 1561056. Its totient is φ = 1523724.

The previous prime is 1542383. The next prime is 1542421. The reversal of 1542389 is 9832451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1542389 - 2¹² = 1538293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542383) 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, 9209 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (390264).

2^1542389 is an apocalyptic number.

It is an amenable number.

1542389 is a deficient number, since it is larger than the sum of its proper divisors (18667).

1542389 is an equidigital number, since it uses as much as digits as its factorization.

1542389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18666.

The product of its digits is 8640, while the sum is 32.

The square root of 1542389 is about 1241.9295471161. The cubic root of 1542389 is about 115.5397188534.

The spelling of 1542389 in words is "one million, five hundred forty-two thousand, three hundred eighty-nine".