845120531 has 8 divisors (see below), whose sum is σ = 852300144. Its totient is φ = 837955840.

The previous prime is 845120519. The next prime is 845120537. The reversal of 845120531 is 135021548.

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

It is a cyclic number.

It is not a de Polignac number, because 845120531 - 2⁶ = 845120467 is a prime.

It is a super-2 number, since 2×845120531² = 1428457423835443922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 845120494 and 845120503.

It is not an unprimeable number, because it can be changed into a prime (845120537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129851 + ... + 136203.

It is an arithmetic number, because the mean of its divisors is an integer number (106537518).

Almost surely, 2^845120531 is an apocalyptic number.

845120531 is a deficient number, since it is larger than the sum of its proper divisors (7179613).

845120531 is a wasteful number, since it uses less digits than its factorization.

845120531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7461.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 845120531 is about 29070.9568297984. The cubic root of 845120531 is about 945.4521434965.

It can be divided in two parts, 8451 and 20531, that added together give a palindrome (28982).

The spelling of 845120531 in words is "eight hundred forty-five million, one hundred twenty thousand, five hundred thirty-one".