40561427 has 4 divisors (see below), whose sum is σ = 41504760. Its totient is φ = 39618096.

The previous prime is 40561403. The next prime is 40561471. The reversal of 40561427 is 72416504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40561427 - 2⁶ = 40561363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40561427.

It is not an unprimeable number, because it can be changed into a prime (40561487) 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, 471602 + ... + 471687.

It is an arithmetic number, because the mean of its divisors is an integer number (10376190).

Almost surely, 2^40561427 is an apocalyptic number.

40561427 is a deficient number, since it is larger than the sum of its proper divisors (943333).

40561427 is an equidigital number, since it uses as much as digits as its factorization.

40561427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943332.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40561427 is about 6368.7853630029. The cubic root of 40561427 is about 343.5878057085.

The spelling of 40561427 in words is "forty million, five hundred sixty-one thousand, four hundred twenty-seven".