1642421246 has 4 divisors (see below), whose sum is σ = 2463631872. Its totient is φ = 821210622.

The previous prime is 1642421197. The next prime is 1642421273. The reversal of 1642421246 is 6421242461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6421242461 = 83 ⋅77364367.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410605310 + ... + 410605313.

It is an arithmetic number, because the mean of its divisors is an integer number (615907968).

Almost surely, 2^1642421246 is an apocalyptic number.

1642421246 is a deficient number, since it is larger than the sum of its proper divisors (821210626).

1642421246 is an equidigital number, since it uses as much as digits as its factorization.

1642421246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821210625.

The product of its digits is 18432, while the sum is 32.

The square root of 1642421246 is about 40526.7966412348. The cubic root of 1642421246 is about 1179.8537705418.

The spelling of 1642421246 in words is "one billion, six hundred forty-two million, four hundred twenty-one thousand, two hundred forty-six".