1642259 has 2 divisors, whose sum is σ = 1642260. Its totient is φ = 1642258.

The previous prime is 1642247. The next prime is 1642273. The reversal of 1642259 is 9522461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642259 - 2⁴ = 1642243 is a prime.

It is a Chen prime.

It is a plaindrome in base 13 and base 15.

It is not a weakly prime, because it can be changed into another prime (1642279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821129 + 821130.

It is an arithmetic number, because the mean of its divisors is an integer number (821130).

2^1642259 is an apocalyptic number.

1642259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642259 is an equidigital number, since it uses as much as digits as its factorization.

1642259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 1642259 is about 1281.5065352935. The cubic root of 1642259 is about 117.9814918784.

The spelling of 1642259 in words is "one million, six hundred forty-two thousand, two hundred fifty-nine".