421342505 has 16 divisors (see below), whose sum is σ = 511657344. Its totient is φ = 333066240.

The previous prime is 421342487. The next prime is 421342517. The reversal of 421342505 is 505243124.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-421342505 is a prime.

It is a Duffinian number.

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, 167084 + ... + 169586.

It is an arithmetic number, because the mean of its divisors is an integer number (31978584).

Almost surely, 2^421342505 is an apocalyptic number.

It is an amenable number.

421342505 is a deficient number, since it is larger than the sum of its proper divisors (90314839).

421342505 is a wasteful number, since it uses less digits than its factorization.

421342505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 421342505 is about 20526.6291679857. The cubic root of 421342505 is about 749.6843145496.

Adding to 421342505 its reverse (505243124), we get a palindrome (926585629).

The spelling of 421342505 in words is "four hundred twenty-one million, three hundred forty-two thousand, five hundred five".