722600042 has 4 divisors (see below), whose sum is σ = 1083900066. Its totient is φ = 361300020.

The previous prime is 722600041. The next prime is 722600059. The reversal of 722600042 is 240006227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240006227 = 97 ⋅2474291.

It can be written as a sum of positive squares in only one way, i.e., 722588161 + 11881 = 26881^2 + 109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 722599990 and 722600017.

It is not an unprimeable number, because it can be changed into a prime (722600041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180650009 + ... + 180650012.

Almost surely, 2^722600042 is an apocalyptic number.

722600042 is a deficient number, since it is larger than the sum of its proper divisors (361300024).

722600042 is a wasteful number, since it uses less digits than its factorization.

722600042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361300023.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 722600042 is about 26881.2209916142. The cubic root of 722600042 is about 897.3585273707.

Adding to 722600042 its reverse (240006227), we get a palindrome (962606269).

The spelling of 722600042 in words is "seven hundred twenty-two million, six hundred thousand, forty-two".