142185473 has 2 divisors, whose sum is σ = 142185474. Its totient is φ = 142185472.

The previous prime is 142185451. The next prime is 142185479. The reversal of 142185473 is 374581241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 63473089 = 8872^2 + 7967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142185473 is a prime.

It is not a weakly prime, because it can be changed into another prime (142185479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71092736 + 71092737.

It is an arithmetic number, because the mean of its divisors is an integer number (71092737).

Almost surely, 2^142185473 is an apocalyptic number.

It is an amenable number.

142185473 is a deficient number, since it is larger than the sum of its proper divisors (1).

142185473 is an equidigital number, since it uses as much as digits as its factorization.

142185473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 142185473 is about 11924.1550224743. The cubic root of 142185473 is about 521.9373894264.

It can be divided in two parts, 14218 and 5473, that added together give a palindrome (19691).

The spelling of 142185473 in words is "one hundred forty-two million, one hundred eighty-five thousand, four hundred seventy-three".