420141905 has 8 divisors (see below), whose sum is σ = 505617000. Its totient is φ = 335149056.

The previous prime is 420141901. The next prime is 420141907. The reversal of 420141905 is 509141024.

It can be written as a sum of positive squares in 4 ways, for example, as 180015889 + 240126016 = 13417^2 + 15496^2 .

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 420141905 - 2² = 420141901 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420141901) 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, 118640 + ... + 122129.

It is an arithmetic number, because the mean of its divisors is an integer number (63202125).

Almost surely, 2^420141905 is an apocalyptic number.

It is an amenable number.

420141905 is a deficient number, since it is larger than the sum of its proper divisors (85475095).

420141905 is a wasteful number, since it uses less digits than its factorization.

420141905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241123.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 420141905 is about 20497.3633670285. The cubic root of 420141905 is about 748.9715711642.

Adding to 420141905 its reverse (509141024), we get a palindrome (929282929).

The spelling of 420141905 in words is "four hundred twenty million, one hundred forty-one thousand, nine hundred five".