102749415 has 16 divisors (see below), whose sum is σ = 164530176. Its totient is φ = 54756000.

The previous prime is 102749393. The next prime is 102749417. The reversal of 102749415 is 514947201.

It is a happy number.

It is not a de Polignac number, because 102749415 - 2¹¹ = 102747367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102749417) 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 15 ways as a sum of consecutive naturals, for example, 27510 + ... + 31020.

It is an arithmetic number, because the mean of its divisors is an integer number (10283136).

Almost surely, 2^102749415 is an apocalyptic number.

102749415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102749415 is a deficient number, since it is larger than the sum of its proper divisors (61780761).

102749415 is a wasteful number, since it uses less digits than its factorization.

102749415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 102749415 is about 10136.5386103936. The cubic root of 102749415 is about 468.3743671559.

The spelling of 102749415 in words is "one hundred two million, seven hundred forty-nine thousand, four hundred fifteen".