1642199 has 4 divisors (see below), whose sum is σ = 1768536. Its totient is φ = 1515864.

The previous prime is 1642187. The next prime is 1642211. The reversal of 1642199 is 9912461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1642187) and next prime (1642211).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642199 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642699) 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, 63149 + ... + 63174.

It is an arithmetic number, because the mean of its divisors is an integer number (442134).

2^1642199 is an apocalyptic number.

1642199 is a deficient number, since it is larger than the sum of its proper divisors (126337).

1642199 is a wasteful number, since it uses less digits than its factorization.

1642199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126336.

The product of its digits is 3888, while the sum is 32.

The square root of 1642199 is about 1281.4831251328. The cubic root of 1642199 is about 117.9800550413.

The spelling of 1642199 in words is "one million, six hundred forty-two thousand, one hundred ninety-nine".