405072541 has 4 divisors (see below), whose sum is σ = 405163584. Its totient is φ = 404981500.

The previous prime is 405072523. The next prime is 405072557. The reversal of 405072541 is 145270504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405072541 - 2⁵ = 405072509 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 (405072641) 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, 38485 + ... + 47866.

It is an arithmetic number, because the mean of its divisors is an integer number (101290896).

Almost surely, 2^405072541 is an apocalyptic number.

It is an amenable number.

405072541 is a deficient number, since it is larger than the sum of its proper divisors (91043).

405072541 is an equidigital number, since it uses as much as digits as its factorization.

405072541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91042.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 405072541 is about 20126.4140124365. The cubic root of 405072541 is about 739.9077928695.

The spelling of 405072541 in words is "four hundred five million, seventy-two thousand, five hundred forty-one".