102149441 has 4 divisors (see below), whose sum is σ = 103824084. Its totient is φ = 100474800.

The previous prime is 102149431. The next prime is 102149461. The reversal of 102149441 is 144941201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4060225 + 98089216 = 2015^2 + 9904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102149441 is a prime.

It is a super-2 number, since 2×102149441² = 20869016593224962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102149441.

It is not an unprimeable number, because it can be changed into a prime (102149431) 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, 837230 + ... + 837351.

It is an arithmetic number, because the mean of its divisors is an integer number (25956021).

Almost surely, 2^102149441 is an apocalyptic number.

It is an amenable number.

102149441 is a deficient number, since it is larger than the sum of its proper divisors (1674643).

102149441 is an equidigital number, since it uses as much as digits as its factorization.

102149441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674642.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 102149441 is about 10106.9006624187. The cubic root of 102149441 is about 467.4609436712.

The spelling of 102149441 in words is "one hundred two million, one hundred forty-nine thousand, four hundred forty-one".