102549138 has 32 divisors (see below), whose sum is σ = 208422720. Its totient is φ = 33633600.

The previous prime is 102549131. The next prime is 102549143. The reversal of 102549138 is 831945201.

It is a junction number, because it is equal to n+sod(n) for n = 102549099 and 102549108.

It is not an unprimeable number, because it can be changed into a prime (102549131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118953 + ... + 119811.

It is an arithmetic number, because the mean of its divisors is an integer number (6513210).

Almost surely, 2^102549138 is an apocalyptic number.

102549138 is an abundant number, since it is smaller than the sum of its proper divisors (105873582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102549138 is a wasteful number, since it uses less digits than its factorization.

102549138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 102549138 is about 10126.6548277306. The cubic root of 102549138 is about 468.0698540627.

The spelling of 102549138 in words is "one hundred two million, five hundred forty-nine thousand, one hundred thirty-eight".