102891266 has 4 divisors (see below), whose sum is σ = 154336902. Its totient is φ = 51445632.

The previous prime is 102891253. The next prime is 102891277. The reversal of 102891266 is 662198201.

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., 77176225 + 25715041 = 8785^2 + 5071^2 .

It is a super-2 number, since 2×102891266² = 21173225238165512, which contains 22 as substring.

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, 25722815 + ... + 25722818.

Almost surely, 2^102891266 is an apocalyptic number.

102891266 is a deficient number, since it is larger than the sum of its proper divisors (51445636).

102891266 is an equidigital number, since it uses as much as digits as its factorization.

102891266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51445635.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 102891266 is about 10143.5332108689. The cubic root of 102891266 is about 468.5898065704.

The spelling of 102891266 in words is "one hundred two million, eight hundred ninety-one thousand, two hundred sixty-six".