135431461 has 4 divisors (see below), whose sum is σ = 147743424. Its totient is φ = 123119500.

The previous prime is 135431431. The next prime is 135431473. The reversal of 135431461 is 164134531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135431461 - 2²¹ = 133334309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135431431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155965 + ... + 6155986.

It is an arithmetic number, because the mean of its divisors is an integer number (36935856).

Almost surely, 2^135431461 is an apocalyptic number.

135431461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135431461 is a deficient number, since it is larger than the sum of its proper divisors (12311963).

135431461 is a wasteful number, since it uses less digits than its factorization.

135431461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311962.

The product of its digits is 4320, while the sum is 28.

The square root of 135431461 is about 11637.5023523091. The cubic root of 135431461 is about 513.5387123976.

Adding to 135431461 its reverse (164134531), we get a palindrome (299565992).

The spelling of 135431461 in words is "one hundred thirty-five million, four hundred thirty-one thousand, four hundred sixty-one".