142451557 has 2 divisors, whose sum is σ = 142451558. Its totient is φ = 142451556.

The previous prime is 142451539. The next prime is 142451587. The reversal of 142451557 is 755154241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130850721 + 11600836 = 11439^2 + 3406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142451557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142451527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71225778 + 71225779.

It is an arithmetic number, because the mean of its divisors is an integer number (71225779).

Almost surely, 2^142451557 is an apocalyptic number.

It is an amenable number.

142451557 is a deficient number, since it is larger than the sum of its proper divisors (1).

142451557 is an equidigital number, since it uses as much as digits as its factorization.

142451557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28000, while the sum is 34.

The square root of 142451557 is about 11935.3071598514. The cubic root of 142451557 is about 522.2627687663.

The spelling of 142451557 in words is "one hundred forty-two million, four hundred fifty-one thousand, five hundred fifty-seven".