135421431 has 8 divisors (see below), whose sum is σ = 180881520. Its totient is φ = 90121152.

The previous prime is 135421411. The next prime is 135421441. The reversal of 135421431 is 134124531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135421431 - 2⁶ = 135421367 is a prime.

It is a super-2 number, since 2×135421431² = 36677927948175522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37960 + ... + 41373.

It is an arithmetic number, because the mean of its divisors is an integer number (22610190).

Almost surely, 2^135421431 is an apocalyptic number.

135421431 is a deficient number, since it is larger than the sum of its proper divisors (45460089).

135421431 is an equidigital number, since it uses as much as digits as its factorization.

135421431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79905.

The product of its digits is 1440, while the sum is 24.

The square root of 135421431 is about 11637.0714099382. The cubic root of 135421431 is about 513.5260345938.

Adding to 135421431 its reverse (134124531), we get a palindrome (269545962).

The spelling of 135421431 in words is "one hundred thirty-five million, four hundred twenty-one thousand, four hundred thirty-one".