102942749 has 8 divisors (see below), whose sum is σ = 126698880. Its totient is φ = 81449136.

The previous prime is 102942739. The next prime is 102942751. The reversal of 102942749 is 947249201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102942749 - 2¹⁶ = 102877213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102942739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565529 + ... + 565710.

It is an arithmetic number, because the mean of its divisors is an integer number (15837360).

Almost surely, 2^102942749 is an apocalyptic number.

It is an amenable number.

102942749 is a deficient number, since it is larger than the sum of its proper divisors (23756131).

102942749 is a wasteful number, since it uses less digits than its factorization.

102942749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131259.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 102942749 is about 10146.0706187174. The cubic root of 102942749 is about 468.6679485657.

The spelling of 102942749 in words is "one hundred two million, nine hundred forty-two thousand, seven hundred forty-nine".