423420345 has 16 divisors (see below), whose sum is σ = 752747520. Its totient is φ = 225824112.

The previous prime is 423420281. The next prime is 423420353. The reversal of 423420345 is 543024324.

It is not a de Polignac number, because 423420345 - 2⁶ = 423420281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1568089 + ... + 1568358.

It is an arithmetic number, because the mean of its divisors is an integer number (47046720).

Almost surely, 2^423420345 is an apocalyptic number.

423420345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423420345 is a deficient number, since it is larger than the sum of its proper divisors (329327175).

423420345 is a wasteful number, since it uses less digits than its factorization.

423420345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136461 (or 3136455 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 423420345 is about 20577.1802004065. The cubic root of 423420345 is about 750.9146441148.

Adding to 423420345 its reverse (543024324), we get a palindrome (966444669).

The spelling of 423420345 in words is "four hundred twenty-three million, four hundred twenty thousand, three hundred forty-five".