47542405 has 4 divisors (see below), whose sum is σ = 57050892. Its totient is φ = 38033920.

The previous prime is 47542399. The next prime is 47542457. The reversal of 47542405 is 50424574.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50424574 = 2 ⋅25212287.

It can be written as a sum of positive squares in 2 ways, for example, as 23512801 + 24029604 = 4849^2 + 4902^2 .

It is not a de Polignac number, because 47542405 - 2¹⁷ = 47411333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4754236 + ... + 4754245.

It is an arithmetic number, because the mean of its divisors is an integer number (14262723).

Almost surely, 2^47542405 is an apocalyptic number.

It is an amenable number.

47542405 is a deficient number, since it is larger than the sum of its proper divisors (9508487).

47542405 is an equidigital number, since it uses as much as digits as its factorization.

47542405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9508486.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 47542405 is about 6895.1000717901. The cubic root of 47542405 is about 362.2655606612.

Adding to 47542405 its reverse (50424574), we get a palindrome (97966979).

The spelling of 47542405 in words is "forty-seven million, five hundred forty-two thousand, four hundred five".