54401405 has 4 divisors (see below), whose sum is σ = 65281692. Its totient is φ = 43521120.

The previous prime is 54401401. The next prime is 54401423. The reversal of 54401405 is 50410445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50410445 = 5 ⋅10082089.

It can be written as a sum of positive squares in 2 ways, for example, as 11930116 + 42471289 = 3454^2 + 6517^2 .

It is not a de Polignac number, because 54401405 - 2² = 54401401 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 (54401401) 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, 5440136 + ... + 5440145.

It is an arithmetic number, because the mean of its divisors is an integer number (16320423).

Almost surely, 2^54401405 is an apocalyptic number.

It is an amenable number.

54401405 is a deficient number, since it is larger than the sum of its proper divisors (10880287).

54401405 is a wasteful number, since it uses less digits than its factorization.

54401405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880286.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 54401405 is about 7375.7308112485. The cubic root of 54401405 is about 378.9105568852.

The spelling of 54401405 in words is "fifty-four million, four hundred one thousand, four hundred five".