102345442 has 4 divisors (see below), whose sum is σ = 153518166. Its totient is φ = 51172720.

The previous prime is 102345433. The next prime is 102345443. The reversal of 102345442 is 244543201.

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., 94887081 + 7458361 = 9741^2 + 2731^2 .

It is not an unprimeable number, because it can be changed into a prime (102345443) 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, 25586359 + ... + 25586362.

Almost surely, 2^102345442 is an apocalyptic number.

102345442 is a deficient number, since it is larger than the sum of its proper divisors (51172724).

102345442 is an equidigital number, since it uses as much as digits as its factorization.

102345442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51172723.

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

The square root of 102345442 is about 10116.5924104908. The cubic root of 102345442 is about 467.7597355619.

Adding to 102345442 its reverse (244543201), we get a palindrome (346888643).

The spelling of 102345442 in words is "one hundred two million, three hundred forty-five thousand, four hundred forty-two".