291245130 has 96 divisors (see below), whose sum is σ = 848510208. Its totient is φ = 68688000.

The previous prime is 291245117. The next prime is 291245137. The reversal of 291245130 is 31542192.

291245130 is a `hidden beast` number, since 29 + 124 + 513 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 291245094 and 291245103.

It is not an unprimeable number, because it can be changed into a prime (291245137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32655 + ... + 40605.

It is an arithmetic number, because the mean of its divisors is an integer number (8838648).

Almost surely, 2^291245130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291245130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424255104).

291245130 is an abundant number, since it is smaller than the sum of its proper divisors (557265078).

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

291245130 is a wasteful number, since it uses less digits than its factorization.

291245130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012 (or 8009 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 291245130 is about 17065.9054843275. The cubic root of 291245130 is about 662.8565580361.

The spelling of 291245130 in words is "two hundred ninety-one million, two hundred forty-five thousand, one hundred thirty".