142431405 has 32 divisors (see below), whose sum is σ = 234710784. Its totient is φ = 73721856.

The previous prime is 142431379. The next prime is 142431409. The reversal of 142431405 is 504134241.

It is not a de Polignac number, because 142431405 - 2¹³ = 142423213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142431409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76192 + ... + 78038.

It is an arithmetic number, because the mean of its divisors is an integer number (7334712).

Almost surely, 2^142431405 is an apocalyptic number.

142431405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142431405 is a deficient number, since it is larger than the sum of its proper divisors (92279379).

142431405 is a wasteful number, since it uses less digits than its factorization.

142431405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 142431405 is about 11934.4629120878. The cubic root of 142431405 is about 522.2381401935.

Adding to 142431405 its reverse (504134241), we get a palindrome (646565646).

The spelling of 142431405 in words is "one hundred forty-two million, four hundred thirty-one thousand, four hundred five".