102286491 has 4 divisors (see below), whose sum is σ = 136381992. Its totient is φ = 68190992.

The previous prime is 102286489. The next prime is 102286493. The reversal of 102286491 is 194682201.

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

It is an interprime number because it is at equal distance from previous prime (102286489) and next prime (102286493).

It is a cyclic number.

It is not a de Polignac number, because 102286491 - 2¹ = 102286489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102286493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17047746 + ... + 17047751.

It is an arithmetic number, because the mean of its divisors is an integer number (34095498).

Almost surely, 2^102286491 is an apocalyptic number.

102286491 is a deficient number, since it is larger than the sum of its proper divisors (34095501).

102286491 is an equidigital number, since it uses as much as digits as its factorization.

102286491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34095500.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 102286491 is about 10113.6784109443. The cubic root of 102286491 is about 467.6699084050.

The spelling of 102286491 in words is "one hundred two million, two hundred eighty-six thousand, four hundred ninety-one".