1200042522 has 24 divisors (see below), whose sum is σ = 2971534176. Its totient is φ = 342869256.

The previous prime is 1200042499. The next prime is 1200042523. The reversal of 1200042522 is 2252400021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1200042495 and 1200042504.

It is not an unprimeable number, because it can be changed into a prime (1200042523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4761948 + ... + 4762199.

It is an arithmetic number, because the mean of its divisors is an integer number (123813924).

Almost surely, 2^1200042522 is an apocalyptic number.

1200042522 is an abundant number, since it is smaller than the sum of its proper divisors (1771491654).

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

1200042522 is a wasteful number, since it uses less digits than its factorization.

1200042522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9524162 (or 9524159 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1200042522 is about 34641.6298981442. The cubic root of 1200042522 is about 1062.6711208032.

Adding to 1200042522 its reverse (2252400021), we get a palindrome (3452442543).

The spelling of 1200042522 in words is "one billion, two hundred million, forty-two thousand, five hundred twenty-two".