1642253 has 4 divisors (see below), whose sum is σ = 1644960. Its totient is φ = 1639548.

The previous prime is 1642247. The next prime is 1642259. The reversal of 1642253 is 3522461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3522461 = 601 ⋅5861.

It is an interprime number because it is at equal distance from previous prime (1642247) and next prime (1642259).

It is a cyclic number.

It is not a de Polignac number, because 1642253 - 2¹⁰ = 1641229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642259) 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, 26 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (411240).

2^1642253 is an apocalyptic number.

It is an amenable number.

1642253 is a deficient number, since it is larger than the sum of its proper divisors (2707).

1642253 is an equidigital number, since it uses as much as digits as its factorization.

1642253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706.

The product of its digits is 1440, while the sum is 23.

The square root of 1642253 is about 1281.5041942967. The cubic root of 1642253 is about 117.9813481962.

The spelling of 1642253 in words is "one million, six hundred forty-two thousand, two hundred fifty-three".