1721160642 has 16 divisors (see below), whose sum is σ = 3469427712. Its totient is φ = 569202480.

The previous prime is 1721160583. The next prime is 1721160647. The reversal of 1721160642 is 2460611271.

It is not an unprimeable number, because it can be changed into a prime (1721160647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1128609 + ... + 1130132.

It is an arithmetic number, because the mean of its divisors is an integer number (216839232).

Almost surely, 2^1721160642 is an apocalyptic number.

1721160642 is an abundant number, since it is smaller than the sum of its proper divisors (1748267070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721160642 is a wasteful number, since it uses less digits than its factorization.

1721160642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258873.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1721160642 is about 41486.8731287380. The cubic root of 1721160642 is about 1198.4147219446.

The spelling of 1721160642 in words is "one billion, seven hundred twenty-one million, one hundred sixty thousand, six hundred forty-two".