10209142 has 4 divisors (see below), whose sum is σ = 15313716. Its totient is φ = 5104570.

The previous prime is 10209127. The next prime is 10209169. The reversal of 10209142 is 24190201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2552284 + ... + 2552287.

It is an arithmetic number, because the mean of its divisors is an integer number (3828429).

Almost surely, 2^10209142 is an apocalyptic number.

10209142 is a deficient number, since it is larger than the sum of its proper divisors (5104574).

10209142 is an equidigital number, since it uses as much as digits as its factorization.

10209142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104573.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 10209142 is about 3195.1747996002. The cubic root of 10209142 is about 216.9350609481.

Adding to 10209142 its reverse (24190201), we get a palindrome (34399343).

The spelling of 10209142 in words is "ten million, two hundred nine thousand, one hundred forty-two".