142845761 has 8 divisors (see below), whose sum is σ = 143896104. Its totient is φ = 141799680.

The previous prime is 142845757. The next prime is 142845767. The reversal of 142845761 is 167548241.

It can be written as a sum of positive squares in 4 ways, for example, as 76667536 + 66178225 = 8756^2 + 8135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142845761 - 2² = 142845757 is a prime.

It is a super-2 number, since 2×142845761² = 40809822871338242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142845767) 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 7 ways as a sum of consecutive naturals, for example, 94931 + ... + 96423.

It is an arithmetic number, because the mean of its divisors is an integer number (17987013).

Almost surely, 2^142845761 is an apocalyptic number.

It is an amenable number.

142845761 is a deficient number, since it is larger than the sum of its proper divisors (1050343).

142845761 is a wasteful number, since it uses less digits than its factorization.

142845761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

The product of its digits is 53760, while the sum is 38.

The square root of 142845761 is about 11951.8099466148. The cubic root of 142845761 is about 522.7440749744.

The spelling of 142845761 in words is "one hundred forty-two million, eight hundred forty-five thousand, seven hundred sixty-one".