102134891 has 4 divisors (see below), whose sum is σ = 102306000. Its totient is φ = 101963784.

The previous prime is 102134873. The next prime is 102134941. The reversal of 102134891 is 198431201.

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

It is a cyclic number.

It is not a de Polignac number, because 102134891 - 2²⁶ = 35026027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102134831) 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, 84656 + ... + 85853.

It is an arithmetic number, because the mean of its divisors is an integer number (25576500).

Almost surely, 2^102134891 is an apocalyptic number.

102134891 is a deficient number, since it is larger than the sum of its proper divisors (171109).

102134891 is an equidigital number, since it uses as much as digits as its factorization.

102134891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171108.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 102134891 is about 10106.1808315506. The cubic root of 102134891 is about 467.4387478255.

The spelling of 102134891 in words is "one hundred two million, one hundred thirty-four thousand, eight hundred ninety-one".