102781422 has 48 divisors (see below), whose sum is σ = 239831280. Its totient is φ = 31693056.

The previous prime is 102781409. The next prime is 102781429. The reversal of 102781422 is 224187201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102781429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15208 + ... + 20900.

It is an arithmetic number, because the mean of its divisors is an integer number (4996485).

Almost surely, 2^102781422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102781422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119915640).

102781422 is an abundant number, since it is smaller than the sum of its proper divisors (137049858).

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

102781422 is a wasteful number, since it uses less digits than its factorization.

102781422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5774 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 102781422 is about 10138.1172808367. The cubic root of 102781422 is about 468.4229958254.

The spelling of 102781422 in words is "one hundred two million, seven hundred eighty-one thousand, four hundred twenty-two".