425440403 has 2 divisors, whose sum is σ = 425440404. Its totient is φ = 425440402.

The previous prime is 425440399. The next prime is 425440417. The reversal of 425440403 is 304044524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425440403 - 2² = 425440399 is a prime.

It is not a weakly prime, because it can be changed into another prime (425440003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212720201 + 212720202.

It is an arithmetic number, because the mean of its divisors is an integer number (212720202).

Almost surely, 2^425440403 is an apocalyptic number.

425440403 is a deficient number, since it is larger than the sum of its proper divisors (1).

425440403 is an equidigital number, since it uses as much as digits as its factorization.

425440403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 425440403 is about 20626.2067040937. The cubic root of 425440403 is about 752.1069071216.

Adding to 425440403 its reverse (304044524), we get a palindrome (729484927).

It can be divided in two parts, 42 and 5440403, that added together give a palindrome (5440445).

The spelling of 425440403 in words is "four hundred twenty-five million, four hundred forty thousand, four hundred three".