291252106 has 4 divisors (see below), whose sum is σ = 436878162. Its totient is φ = 145626052.

The previous prime is 291252067. The next prime is 291252131. The reversal of 291252106 is 601252192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 289306081 + 1946025 = 17009^2 + 1395^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 72813025 + ... + 72813028.

Almost surely, 2^291252106 is an apocalyptic number.

291252106 is a deficient number, since it is larger than the sum of its proper divisors (145626056).

291252106 is a wasteful number, since it uses less digits than its factorization.

291252106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145626055.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 291252106 is about 17066.1098672193. The cubic root of 291252106 is about 662.8618503139.

The spelling of 291252106 in words is "two hundred ninety-one million, two hundred fifty-two thousand, one hundred six".