142583521 has 2 divisors, whose sum is σ = 142583522. Its totient is φ = 142583520.

The previous prime is 142583503. The next prime is 142583531. The reversal of 142583521 is 125385241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98227921 + 44355600 = 9911^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 142583521 - 2⁵ = 142583489 is a prime.

It is not a weakly prime, because it can be changed into another prime (142583531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71291760 + 71291761.

It is an arithmetic number, because the mean of its divisors is an integer number (71291761).

Almost surely, 2^142583521 is an apocalyptic number.

It is an amenable number.

142583521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142583521 is an equidigital number, since it uses as much as digits as its factorization.

142583521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 142583521 is about 11940.8341835904. The cubic root of 142583521 is about 522.4239899198.

The spelling of 142583521 in words is "one hundred forty-two million, five hundred eighty-three thousand, five hundred twenty-one".