253421135 has 16 divisors (see below), whose sum is σ = 336707712. Its totient is φ = 181552800.

The previous prime is 253421131. The next prime is 253421167. The reversal of 253421135 is 531124352.

It is a happy number.

It is not a de Polignac number, because 253421135 - 2² = 253421131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253421131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30701 + ... + 38070.

It is an arithmetic number, because the mean of its divisors is an integer number (21044232).

Almost surely, 2^253421135 is an apocalyptic number.

253421135 is a deficient number, since it is larger than the sum of its proper divisors (83286577).

253421135 is a wasteful number, since it uses less digits than its factorization.

253421135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68854.

The product of its digits is 3600, while the sum is 26.

The square root of 253421135 is about 15919.2064814802. The cubic root of 253421135 is about 632.8210891909.

Adding to 253421135 its reverse (531124352), we get a palindrome (784545487).

The spelling of 253421135 in words is "two hundred fifty-three million, four hundred twenty-one thousand, one hundred thirty-five".