9142405 has 4 divisors (see below), whose sum is σ = 10970892. Its totient is φ = 7313920.

The previous prime is 9142391. The next prime is 9142411. The reversal of 9142405 is 5042419.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 8014561 = 1062^2 + 2831^2 .

It is not a de Polignac number, because 9142405 - 2⁵ = 9142373 is a prime.

It is a Duffinian number.

9142405 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9142405.

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, 914236 + ... + 914245.

It is an arithmetic number, because the mean of its divisors is an integer number (2742723).

Almost surely, 2^9142405 is an apocalyptic number.

It is an amenable number.

9142405 is a deficient number, since it is larger than the sum of its proper divisors (1828487).

9142405 is a wasteful number, since it uses less digits than its factorization.

9142405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828486.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 9142405 is about 3023.6410170521. The cubic root of 9142405 is about 209.0997364378.

The spelling of 9142405 in words is "nine million, one hundred forty-two thousand, four hundred five".