102135434 has 4 divisors (see below), whose sum is σ = 153203154. Its totient is φ = 51067716.

The previous prime is 102135413. The next prime is 102135437. The reversal of 102135434 is 434531201.

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., 51768025 + 50367409 = 7195^2 + 7097^2 .

It is not an unprimeable number, because it can be changed into a prime (102135437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25533857 + ... + 25533860.

Almost surely, 2^102135434 is an apocalyptic number.

102135434 is a deficient number, since it is larger than the sum of its proper divisors (51067720).

102135434 is an equidigital number, since it uses as much as digits as its factorization.

102135434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51067719.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 102135434 is about 10106.2076962627. The cubic root of 102135434 is about 467.4395762031.

Adding to 102135434 its reverse (434531201), we get a palindrome (536666635).

The spelling of 102135434 in words is "one hundred two million, one hundred thirty-five thousand, four hundred thirty-four".