135533401 has 4 divisors (see below), whose sum is σ = 143505972. Its totient is φ = 127560832.

The previous prime is 135533393. The next prime is 135533407. The reversal of 135533401 is 104335531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104335531 = 367 ⋅284293.

It can be written as a sum of positive squares in 2 ways, for example, as 111513600 + 24019801 = 10560^2 + 4901^2 .

It is a cyclic number.

It is not a de Polignac number, because 135533401 - 2³ = 135533393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135533407) 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, 3986260 + ... + 3986293.

It is an arithmetic number, because the mean of its divisors is an integer number (35876493).

Almost surely, 2^135533401 is an apocalyptic number.

It is an amenable number.

135533401 is a deficient number, since it is larger than the sum of its proper divisors (7972571).

135533401 is an equidigital number, since it uses as much as digits as its factorization.

135533401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972570.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 135533401 is about 11641.8813342174. The cubic root of 135533401 is about 513.6675278803.

Adding to 135533401 its reverse (104335531), we get a palindrome (239868932).

The spelling of 135533401 in words is "one hundred thirty-five million, five hundred thirty-three thousand, four hundred one".