142907405 has 4 divisors (see below), whose sum is σ = 171488892. Its totient is φ = 114325920.

The previous prime is 142907383. The next prime is 142907437. The reversal of 142907405 is 504709241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504709241 = 2531 ⋅199411.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 123520996 = 4403^2 + 11114^2 .

It is not a de Polignac number, because 142907405 - 2²² = 138713101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14290736 + ... + 14290745.

It is an arithmetic number, because the mean of its divisors is an integer number (42872223).

Almost surely, 2^142907405 is an apocalyptic number.

It is an amenable number.

142907405 is a deficient number, since it is larger than the sum of its proper divisors (28581487).

142907405 is an equidigital number, since it uses as much as digits as its factorization.

142907405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28581486.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 142907405 is about 11954.3885247218. The cubic root of 142907405 is about 522.8192595681.

The spelling of 142907405 in words is "one hundred forty-two million, nine hundred seven thousand, four hundred five".