420340523 has 8 divisors (see below), whose sum is σ = 433261488. Its totient is φ = 407562624.

The previous prime is 420340517. The next prime is 420340537. The reversal of 420340523 is 325043024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420340523 - 2⁸ = 420340267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420340423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29786 + ... + 41567.

It is an arithmetic number, because the mean of its divisors is an integer number (54157686).

Almost surely, 2^420340523 is an apocalyptic number.

420340523 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

420340523 is a deficient number, since it is larger than the sum of its proper divisors (12920965).

420340523 is a wasteful number, since it uses less digits than its factorization.

420340523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71533.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 420340523 is about 20502.2077591658. The cubic root of 420340523 is about 749.0895755800.

Adding to 420340523 its reverse (325043024), we get a palindrome (745383547).

The spelling of 420340523 in words is "four hundred twenty million, three hundred forty thousand, five hundred twenty-three".