842534451 has 24 divisors (see below), whose sum is σ = 1329070080. Its totient is φ = 510073200.

The previous prime is 842534443. The next prime is 842534453. The reversal of 842534451 is 154435248.

It is a happy number.

842534451 is a `hidden beast` number, since 84 + 2 + 534 + 45 + 1 = 666.

It is not a de Polignac number, because 842534451 - 2³ = 842534443 is a prime.

It is a super-2 number, since 2×842534451² = 1419728602243742802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842534453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98766 + ... + 106956.

It is an arithmetic number, because the mean of its divisors is an integer number (55377920).

Almost surely, 2^842534451 is an apocalyptic number.

842534451 is a deficient number, since it is larger than the sum of its proper divisors (486535629).

842534451 is a wasteful number, since it uses less digits than its factorization.

842534451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247 (or 9244 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 842534451 is about 29026.4439950883. The cubic root of 842534451 is about 944.4867928103.

Adding to 842534451 its reverse (154435248), we get a palindrome (996969699).

The spelling of 842534451 in words is "eight hundred forty-two million, five hundred thirty-four thousand, four hundred fifty-one".