1040420431 has 2 divisors, whose sum is σ = 1040420432. Its totient is φ = 1040420430.

The previous prime is 1040420429. The next prime is 1040420461. The reversal of 1040420431 is 1340240401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1040420431 - 2¹ = 1040420429 is a prime.

It is a super-2 number, since 2×1040420431² = 2164949346484451522, which contains 22 as substring.

Together with 1040420429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1040420399 and 1040420408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040420461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520210215 + 520210216.

It is an arithmetic number, because the mean of its divisors is an integer number (520210216).

Almost surely, 2^1040420431 is an apocalyptic number.

1040420431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040420431 is an equidigital number, since it uses as much as digits as its factorization.

1040420431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1040420431 is about 32255.5488404708. The cubic root of 1040420431 is about 1013.2959122285.

Adding to 1040420431 its reverse (1340240401), we get a palindrome (2380660832).

The spelling of 1040420431 in words is "one billion, forty million, four hundred twenty thousand, four hundred thirty-one".