142206557 has 4 divisors (see below), whose sum is σ = 144006720. Its totient is φ = 140406396.

The previous prime is 142206551. The next prime is 142206569. The reversal of 142206557 is 755602241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142206557 - 2⁴ = 142206541 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 (142206551) 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, 899963 + ... + 900120.

It is an arithmetic number, because the mean of its divisors is an integer number (36001680).

Almost surely, 2^142206557 is an apocalyptic number.

It is an amenable number.

142206557 is a deficient number, since it is larger than the sum of its proper divisors (1800163).

142206557 is an equidigital number, since it uses as much as digits as its factorization.

142206557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800162.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 142206557 is about 11925.0390775041. The cubic root of 142206557 is about 521.9631866798.

Adding to 142206557 its reverse (755602241), we get a palindrome (897808798).

The spelling of 142206557 in words is "one hundred forty-two million, two hundred six thousand, five hundred fifty-seven".