1542239 has 2 divisors, whose sum is σ = 1542240. Its totient is φ = 1542238.

The previous prime is 1542221. The next prime is 1542251. The reversal of 1542239 is 9322451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1542239 - 2¹⁶ = 1476703 is a prime.

It is a super-2 number, since 2×1542239² = 4757002266242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771119 + 771120.

It is an arithmetic number, because the mean of its divisors is an integer number (771120).

2^1542239 is an apocalyptic number.

1542239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542239 is an equidigital number, since it uses as much as digits as its factorization.

1542239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 1542239 is about 1241.8691557487. The cubic root of 1542239 is about 115.5359732528.

The spelling of 1542239 in words is "one million, five hundred forty-two thousand, two hundred thirty-nine".