102015434 has 4 divisors (see below), whose sum is σ = 153023154. Its totient is φ = 51007716.

The previous prime is 102015391. The next prime is 102015439. The reversal of 102015434 is 434510201.

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., 84584809 + 17430625 = 9197^2 + 4175^2 .

It is not an unprimeable number, because it can be changed into a prime (102015439) by changing a digit.

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 as a sum of consecutive naturals, namely, 25503857 + ... + 25503860.

Almost surely, 2^102015434 is an apocalyptic number.

102015434 is a deficient number, since it is larger than the sum of its proper divisors (51007720).

102015434 is an equidigital number, since it uses as much as digits as its factorization.

102015434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51007719.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102015434 is about 10100.2690063186. The cubic root of 102015434 is about 467.2564378959.

Adding to 102015434 its reverse (434510201), we get a palindrome (536525635).

The spelling of 102015434 in words is "one hundred two million, fifteen thousand, four hundred thirty-four".