1642222087 has 4 divisors (see below), whose sum is σ = 1791515016. Its totient is φ = 1492929160.

The previous prime is 1642222081. The next prime is 1642222123. The reversal of 1642222087 is 7802222461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7802222461 = 11 ⋅709292951.

It is a cyclic number.

It is not a de Polignac number, because 1642222087 - 2²⁷ = 1508004359 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 (1642222081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74646448 + ... + 74646469.

It is an arithmetic number, because the mean of its divisors is an integer number (447878754).

Almost surely, 2^1642222087 is an apocalyptic number.

1642222087 is a deficient number, since it is larger than the sum of its proper divisors (149292929).

1642222087 is a wasteful number, since it uses less digits than its factorization.

1642222087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149292928.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 1642222087 is about 40524.3394394036. The cubic root of 1642222087 is about 1179.8060791642.

It can be divided in two parts, 1642 and 222087, that added together give a square (223729 = 473²).

The spelling of 1642222087 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, eighty-seven".