102425240 has 32 divisors (see below), whose sum is σ = 237893760. Its totient is φ = 39648000.

The previous prime is 102425231. The next prime is 102425243. The reversal of 102425240 is 42524201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102425243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40061 + ... + 42540.

It is an arithmetic number, because the mean of its divisors is an integer number (7434180).

Almost surely, 2^102425240 is an apocalyptic number.

102425240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102425240 is an abundant number, since it is smaller than the sum of its proper divisors (135468520).

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

102425240 is a wasteful number, since it uses less digits than its factorization.

102425240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82643 (or 82639 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 102425240 is about 10120.5355589514. The cubic root of 102425240 is about 467.8812736062.

Adding to 102425240 its reverse (42524201), we get a palindrome (144949441).

The spelling of 102425240 in words is "one hundred two million, four hundred twenty-five thousand, two hundred forty".