1642434526 has 4 divisors (see below), whose sum is σ = 2463651792. Its totient is φ = 821217262.

The previous prime is 1642434523. The next prime is 1642434533. The reversal of 1642434526 is 6254342461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6254342461 = 19 ⋅329175919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642434523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410608630 + ... + 410608633.

It is an arithmetic number, because the mean of its divisors is an integer number (615912948).

Almost surely, 2^1642434526 is an apocalyptic number.

1642434526 is a deficient number, since it is larger than the sum of its proper divisors (821217266).

1642434526 is an equidigital number, since it uses as much as digits as its factorization.

1642434526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821217265.

The product of its digits is 138240, while the sum is 37.

The square root of 1642434526 is about 40526.9604831154. The cubic root of 1642434526 is about 1179.8569504844.

Adding to 1642434526 its reverse (6254342461), we get a palindrome (7896776987).

The spelling of 1642434526 in words is "one billion, six hundred forty-two million, four hundred thirty-four thousand, five hundred twenty-six".