1642261642 has 128 divisors (see below), whose sum is σ = 3239792640. Its totient is φ = 608256000.

The previous prime is 1642261631. The next prime is 1642261667. The reversal of 1642261642 is 2461622461.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1642261598 and 1642261607.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18452334 + ... + 18452422.

It is an arithmetic number, because the mean of its divisors is an integer number (25310880).

Almost surely, 2^1642261642 is an apocalyptic number.

1642261642 is a deficient number, since it is larger than the sum of its proper divisors (1597530998).

1642261642 is a wasteful number, since it uses less digits than its factorization.

1642261642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248.

The product of its digits is 27648, while the sum is 34.

The square root of 1642261642 is about 40524.8274764989. The cubic root of 1642261642 is about 1179.8155514629.

The spelling of 1642261642 in words is "one billion, six hundred forty-two million, two hundred sixty-one thousand, six hundred forty-two".