102140649 has 16 divisors (see below), whose sum is σ = 162960000. Its totient is φ = 62855568.

The previous prime is 102140627. The next prime is 102140663. The reversal of 102140649 is 946041201.

102140649 is a `hidden beast` number, since 1 + 0 + 2 + 14 + 0 + 649 = 666.

It is not a de Polignac number, because 102140649 - 2⁵ = 102140617 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 (102140249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145149 + ... + 145850.

It is an arithmetic number, because the mean of its divisors is an integer number (10185000).

Almost surely, 2^102140649 is an apocalyptic number.

It is an amenable number.

102140649 is a deficient number, since it is larger than the sum of its proper divisors (60819351).

102140649 is a wasteful number, since it uses less digits than its factorization.

102140649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291021 (or 291015 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 102140649 is about 10106.4657027074. The cubic root of 102140649 is about 467.4475318355.

The spelling of 102140649 in words is "one hundred two million, one hundred forty thousand, six hundred forty-nine".