421289265 has 16 divisors (see below), whose sum is σ = 677791296. Its totient is φ = 223444800.

The previous prime is 421289249. The next prime is 421289269. The reversal of 421289265 is 562982124.

It is not a de Polignac number, because 421289265 - 2⁴ = 421289249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421289269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74871 + ... + 80300.

It is an arithmetic number, because the mean of its divisors is an integer number (42361956).

Almost surely, 2^421289265 is an apocalyptic number.

It is an amenable number.

421289265 is a deficient number, since it is larger than the sum of its proper divisors (256502031).

421289265 is a wasteful number, since it uses less digits than its factorization.

421289265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155360.

The product of its digits is 69120, while the sum is 39.

The square root of 421289265 is about 20525.3322750205. The cubic root of 421289265 is about 749.6527370138.

The spelling of 421289265 in words is "four hundred twenty-one million, two hundred eighty-nine thousand, two hundred sixty-five".