142571557 has 4 divisors (see below), whose sum is σ = 142994956. Its totient is φ = 142148160.

The previous prime is 142571519. The next prime is 142571563. The reversal of 142571557 is 755175241.

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 50680161 + 91891396 = 7119^2 + 9586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142571557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142571057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211194 + ... + 211867.

It is an arithmetic number, because the mean of its divisors is an integer number (35748739).

Almost surely, 2^142571557 is an apocalyptic number.

It is an amenable number.

142571557 is a deficient number, since it is larger than the sum of its proper divisors (423399).

142571557 is an equidigital number, since it uses as much as digits as its factorization.

142571557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423398.

The product of its digits is 49000, while the sum is 37.

The square root of 142571557 is about 11940.3332030559. Note that the first 3 decimals coincide. The cubic root of 142571557 is about 522.4093775359.

The spelling of 142571557 in words is "one hundred forty-two million, five hundred seventy-one thousand, five hundred fifty-seven".