842540530 has 32 divisors (see below), whose sum is σ = 1653926400. Its totient is φ = 307150272.

The previous prime is 842540527. The next prime is 842540539. The reversal of 842540530 is 35045248.

It is a junction number, because it is equal to n+sod(n) for n = 842540492 and 842540501.

It is not an unprimeable number, because it can be changed into a prime (842540539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30750 + ... + 51289.

It is an arithmetic number, because the mean of its divisors is an integer number (51685200).

Almost surely, 2^842540530 is an apocalyptic number.

842540530 is a deficient number, since it is larger than the sum of its proper divisors (811385870).

842540530 is a wasteful number, since it uses less digits than its factorization.

842540530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82138.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 842540530 is about 29026.5487097588. The cubic root of 842540530 is about 944.4890643382.

Adding to 842540530 its reverse (35045248), we get a palindrome (877585778).

The spelling of 842540530 in words is "eight hundred forty-two million, five hundred forty thousand, five hundred thirty".