102445240 has 64 divisors (see below), whose sum is σ = 237686400. Its totient is φ = 39722112.

The previous prime is 102445229. The next prime is 102445249. The reversal of 102445240 is 42544201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102445249) 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, 195619 + ... + 196141.

It is an arithmetic number, because the mean of its divisors is an integer number (3713850).

Almost surely, 2^102445240 is an apocalyptic number.

102445240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102445240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118843200).

102445240 is an abundant number, since it is smaller than the sum of its proper divisors (135241160).

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

102445240 is a wasteful number, since it uses less digits than its factorization.

102445240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 102445240 is about 10121.5236007234. The cubic root of 102445240 is about 467.9117251383.

Adding to 102445240 its reverse (42544201), we get a palindrome (144989441).

It can be divided in two parts, 1024 and 45240, that added together give a palindrome (46264).

The spelling of 102445240 in words is "one hundred two million, four hundred forty-five thousand, two hundred forty".