1642622434 has 4 divisors (see below), whose sum is σ = 2463933654. Its totient is φ = 821311216.

The previous prime is 1642622413. The next prime is 1642622461. The reversal of 1642622434 is 4342262461.

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

It can be written as a sum of positive squares in only one way, i.e., 1474790409 + 167832025 = 38403^2 + 12955^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1642622434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410655607 + ... + 410655610.

Almost surely, 2^1642622434 is an apocalyptic number.

1642622434 is a deficient number, since it is larger than the sum of its proper divisors (821311220).

1642622434 is an equidigital number, since it uses as much as digits as its factorization.

1642622434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821311219.

The product of its digits is 55296, while the sum is 34.

The square root of 1642622434 is about 40529.2787253857. The cubic root of 1642622434 is about 1179.9019438772.

Adding to 1642622434 its reverse (4342262461), we get a palindrome (5984884895).

The spelling of 1642622434 in words is "one billion, six hundred forty-two million, six hundred twenty-two thousand, four hundred thirty-four".