102242725 has 24 divisors (see below), whose sum is σ = 139881672. Its totient is φ = 73651200.

The previous prime is 102242717. The next prime is 102242731. The reversal of 102242725 is 527242201.

It can be written as a sum of positive squares in 12 ways, for example, as 67125249 + 35117476 = 8193^2 + 5926^2 .

It is not a de Polignac number, because 102242725 - 2³ = 102242717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102242725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9489 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (5828403).

Almost surely, 2^102242725 is an apocalyptic number.

It is an amenable number.

102242725 is a deficient number, since it is larger than the sum of its proper divisors (37638947).

102242725 is a wasteful number, since it uses less digits than its factorization.

102242725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7737 (or 7732 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 102242725 is about 10111.5144760812. The cubic root of 102242725 is about 467.6031972131.

Adding to 102242725 its reverse (527242201), we get a palindrome (629484926).

The spelling of 102242725 in words is "one hundred two million, two hundred forty-two thousand, seven hundred twenty-five".