102425566 has 4 divisors (see below), whose sum is σ = 153638352. Its totient is φ = 51212782.

The previous prime is 102425563. The next prime is 102425597. The reversal of 102425566 is 665524201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665524201 = 43 ⋅15477307.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102425563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606390 + ... + 25606393.

It is an arithmetic number, because the mean of its divisors is an integer number (38409588).

Almost surely, 2^102425566 is an apocalyptic number.

102425566 is a deficient number, since it is larger than the sum of its proper divisors (51212786).

102425566 is an equidigital number, since it uses as much as digits as its factorization.

102425566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51212785.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 102425566 is about 10120.5516648056. The cubic root of 102425566 is about 467.8817699979.

Adding to 102425566 its reverse (665524201), we get a palindrome (767949767).

The spelling of 102425566 in words is "one hundred two million, four hundred twenty-five thousand, five hundred sixty-six".