102145133 has 4 divisors (see below), whose sum is σ = 102381468. Its totient is φ = 101908800.

The previous prime is 102145117. The next prime is 102145157. The reversal of 102145133 is 331541201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331541201 = 37 ⋅8960573.

It can be written as a sum of positive squares in 2 ways, for example, as 62932489 + 39212644 = 7933^2 + 6262^2 .

It is a cyclic number.

It is not a de Polignac number, because 102145133 - 2⁴ = 102145117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102145633) 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, 117518 + ... + 118383.

It is an arithmetic number, because the mean of its divisors is an integer number (25595367).

Almost surely, 2^102145133 is an apocalyptic number.

It is an amenable number.

102145133 is a deficient number, since it is larger than the sum of its proper divisors (236335).

102145133 is an equidigital number, since it uses as much as digits as its factorization.

102145133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236334.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 102145133 is about 10106.6875384569. The cubic root of 102145133 is about 467.4543720899.

Adding to 102145133 its reverse (331541201), we get a palindrome (433686334).

The spelling of 102145133 in words is "one hundred two million, one hundred forty-five thousand, one hundred thirty-three".