40427143 has 2 divisors, whose sum is σ = 40427144. Its totient is φ = 40427142.

The previous prime is 40427087. The next prime is 40427171. The reversal of 40427143 is 34172404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40427143 is a prime.

It is a super-2 number, since 2×40427143² = 3268707782284898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40427183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20213571 + 20213572.

It is an arithmetic number, because the mean of its divisors is an integer number (20213572).

Almost surely, 2^40427143 is an apocalyptic number.

40427143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40427143 is an equidigital number, since it uses as much as digits as its factorization.

40427143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 40427143 is about 6358.2342674677. The cubic root of 40427143 is about 343.2082221330.

Adding to 40427143 its reverse (34172404), we get a palindrome (74599547).

The spelling of 40427143 in words is "forty million, four hundred twenty-seven thousand, one hundred forty-three".