1801722542 has 8 divisors (see below), whose sum is σ = 2789764032. Its totient is φ = 871801200.

The previous prime is 1801722541. The next prime is 1801722547. The reversal of 1801722542 is 2452271081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1801722499 and 1801722508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801722541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14529959 + ... + 14530082.

It is an arithmetic number, because the mean of its divisors is an integer number (348720504).

Almost surely, 2^1801722542 is an apocalyptic number.

1801722542 is a deficient number, since it is larger than the sum of its proper divisors (988041490).

1801722542 is a wasteful number, since it uses less digits than its factorization.

1801722542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29060074.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1801722542 is about 42446.7023689709. The cubic root of 1801722542 is about 1216.8283068244.

The spelling of 1801722542 in words is "one billion, eight hundred one million, seven hundred twenty-two thousand, five hundred forty-two".