102425434 has 4 divisors (see below), whose sum is σ = 153638154. Its totient is φ = 51212716.

The previous prime is 102425423. The next prime is 102425471. The reversal of 102425434 is 434524201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 30769209 = 8465^2 + 5547^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102425399 and 102425408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606357 + ... + 25606360.

Almost surely, 2^102425434 is an apocalyptic number.

102425434 is a deficient number, since it is larger than the sum of its proper divisors (51212720).

102425434 is an equidigital number, since it uses as much as digits as its factorization.

102425434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51212719.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 102425434 is about 10120.5451434199. The cubic root of 102425434 is about 467.8815690051.

Adding to 102425434 its reverse (434524201), we get a palindrome (536949635).

The spelling of 102425434 in words is "one hundred two million, four hundred twenty-five thousand, four hundred thirty-four".