142505807 has 2 divisors, whose sum is σ = 142505808. Its totient is φ = 142505806.

The previous prime is 142505789. The next prime is 142505899. The reversal of 142505807 is 708505241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142505807 - 2¹⁸ = 142243663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142555807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71252903 + 71252904.

It is an arithmetic number, because the mean of its divisors is an integer number (71252904).

Almost surely, 2^142505807 is an apocalyptic number.

142505807 is a deficient number, since it is larger than the sum of its proper divisors (1).

142505807 is an equidigital number, since it uses as much as digits as its factorization.

142505807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 142505807 is about 11937.5796123000. The cubic root of 142505807 is about 522.3290583408.

The spelling of 142505807 in words is "one hundred forty-two million, five hundred five thousand, eight hundred seven".