10142505 has 24 divisors (see below), whose sum is σ = 17668872. Its totient is φ = 5382144.

The previous prime is 10142501. The next prime is 10142507. The reversal of 10142505 is 50524101.

It can be written as a sum of positive squares in 4 ways, for example, as 5631129 + 4511376 = 2373^2 + 2124^2 .

It is not a de Polignac number, because 10142505 - 2² = 10142501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10142501) 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 in 23 ways as a sum of consecutive naturals, for example, 11127 + ... + 12003.

It is an arithmetic number, because the mean of its divisors is an integer number (736203).

Almost surely, 2^10142505 is an apocalyptic number.

10142505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10142505 is a deficient number, since it is larger than the sum of its proper divisors (7526367).

10142505 is a wasteful number, since it uses less digits than its factorization.

10142505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 10142505 is about 3184.7299728548. The cubic root of 10142505 is about 216.4620382285.

Adding to 10142505 its reverse (50524101), we get a palindrome (60666606).

The spelling of 10142505 in words is "ten million, one hundred forty-two thousand, five hundred five".