142947909 has 48 divisors (see below), whose sum is σ = 237025152. Its totient is φ = 85520448.

The previous prime is 142947907. The next prime is 142947911. The reversal of 142947909 is 909749241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (142947907) and next prime (142947911).

It is not a de Polignac number, because 142947909 - 2¹ = 142947907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142947901) 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 47 ways as a sum of consecutive naturals, for example, 116272 + ... + 117494.

It is an arithmetic number, because the mean of its divisors is an integer number (4938024).

Almost surely, 2^142947909 is an apocalyptic number.

It is an amenable number.

142947909 is a deficient number, since it is larger than the sum of its proper divisors (94077243).

142947909 is a wasteful number, since it uses less digits than its factorization.

142947909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 142947909 is about 11956.0825105885. The cubic root of 142947909 is about 522.8686488235.

The spelling of 142947909 in words is "one hundred forty-two million, nine hundred forty-seven thousand, nine hundred nine".