142924781 has 2 divisors, whose sum is σ = 142924782. Its totient is φ = 142924780.

The previous prime is 142924777. The next prime is 142924801. The reversal of 142924781 is 187429241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108889225 + 34035556 = 10435^2 + 5834^2 .

It is a cyclic number.

It is not a de Polignac number, because 142924781 - 2² = 142924777 is a prime.

It is a super-2 number, since 2×142924781² = 40854986047795922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142924711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71462390 + 71462391.

It is an arithmetic number, because the mean of its divisors is an integer number (71462391).

Almost surely, 2^142924781 is an apocalyptic number.

It is an amenable number.

142924781 is a deficient number, since it is larger than the sum of its proper divisors (1).

142924781 is an equidigital number, since it uses as much as digits as its factorization.

142924781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 142924781 is about 11955.1152650236. The cubic root of 142924781 is about 522.8404484381.

The spelling of 142924781 in words is "one hundred forty-two million, nine hundred twenty-four thousand, seven hundred eighty-one".