142685401 has 4 divisors (see below), whose sum is σ = 143216100. Its totient is φ = 142154704.

The previous prime is 142685393. The next prime is 142685407. The reversal of 142685401 is 104586241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11560000 + 131125401 = 3400^2 + 11451^2 .

It is a cyclic number.

It is not a de Polignac number, because 142685401 - 2³ = 142685393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142685407) 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 3 ways as a sum of consecutive naturals, for example, 264946 + ... + 265483.

It is an arithmetic number, because the mean of its divisors is an integer number (35804025).

Almost surely, 2^142685401 is an apocalyptic number.

It is an amenable number.

142685401 is a deficient number, since it is larger than the sum of its proper divisors (530699).

142685401 is an equidigital number, since it uses as much as digits as its factorization.

142685401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530698.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 142685401 is about 11945.0994554252. The cubic root of 142685401 is about 522.5483892518.

The spelling of 142685401 in words is "one hundred forty-two million, six hundred eighty-five thousand, four hundred one".