53405121 has 32 divisors (see below), whose sum is σ = 90021888. Its totient is φ = 27354240.

The previous prime is 53405101. The next prime is 53405123. The reversal of 53405121 is 12150435.

It is not a de Polignac number, because 53405121 - 2¹¹ = 53403073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (53405123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15280 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (2813184).

Almost surely, 2^53405121 is an apocalyptic number.

It is an amenable number.

53405121 is a deficient number, since it is larger than the sum of its proper divisors (36616767).

53405121 is a wasteful number, since it uses less digits than its factorization.

53405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 53405121 is about 7307.8807461534. The cubic root of 53405121 is about 376.5832227859.

Adding to 53405121 its reverse (12150435), we get a palindrome (65555556).

The spelling of 53405121 in words is "fifty-three million, four hundred five thousand, one hundred twenty-one".