135023451 has 4 divisors (see below), whose sum is σ = 180031272. Its totient is φ = 90015632.

The previous prime is 135023437. The next prime is 135023461. The reversal of 135023451 is 154320531.

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

It is a cyclic number.

It is not a de Polignac number, because 135023451 - 2⁵ = 135023419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135023461) 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, 22503906 + ... + 22503911.

It is an arithmetic number, because the mean of its divisors is an integer number (45007818).

Almost surely, 2^135023451 is an apocalyptic number.

135023451 is a deficient number, since it is larger than the sum of its proper divisors (45007821).

135023451 is an equidigital number, since it uses as much as digits as its factorization.

135023451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45007820.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 135023451 is about 11619.9591651606. The cubic root of 135023451 is about 513.0224864654.

Adding to 135023451 its reverse (154320531), we get a palindrome (289343982).

The spelling of 135023451 in words is "one hundred thirty-five million, twenty-three thousand, four hundred fifty-one".