102743505 has 32 divisors (see below), whose sum is σ = 183110400. Its totient is φ = 54660096.

The previous prime is 102743503. The next prime is 102743513. The reversal of 102743505 is 505347201.

It is a happy number.

It is not a de Polignac number, because 102743505 - 2¹ = 102743503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (102743503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77236 + ... + 78554.

It is an arithmetic number, because the mean of its divisors is an integer number (5722200).

Almost surely, 2^102743505 is an apocalyptic number.

102743505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102743505 is a deficient number, since it is larger than the sum of its proper divisors (80366895).

102743505 is a wasteful number, since it uses less digits than its factorization.

102743505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 102743505 is about 10136.2470865701. The cubic root of 102743505 is about 468.3653869082.

The spelling of 102743505 in words is "one hundred two million, seven hundred forty-three thousand, five hundred five".