102012434 has 4 divisors (see below), whose sum is σ = 153018654. Its totient is φ = 51006216.

The previous prime is 102012431. The next prime is 102012437. The reversal of 102012434 is 434210201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434210201 = 727 ⋅597263.

It is an interprime number because it is at equal distance from previous prime (102012431) and next prime (102012437).

It can be written as a sum of positive squares in only one way, i.e., 94031809 + 7980625 = 9697^2 + 2825^2 .

It is not an unprimeable number, because it can be changed into a prime (102012431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25503107 + ... + 25503110.

Almost surely, 2^102012434 is an apocalyptic number.

102012434 is a deficient number, since it is larger than the sum of its proper divisors (51006220).

102012434 is an equidigital number, since it uses as much as digits as its factorization.

102012434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51006219.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 102012434 is about 10100.1204943307. The cubic root of 102012434 is about 467.2518575986.

Adding to 102012434 its reverse (434210201), we get a palindrome (536222635).

The spelling of 102012434 in words is "one hundred two million, twelve thousand, four hundred thirty-four".