8421269 has 4 divisors (see below), whose sum is σ = 8515980. Its totient is φ = 8326560.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421269 is 9621248.

8421269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1060900 + 7360369 = 1030^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 8421269 - 2¹² = 8417173 is a prime.

It is a super-2 number, since 2×8421269² = 141835543140722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47222 + ... + 47399.

It is an arithmetic number, because the mean of its divisors is an integer number (2128995).

Almost surely, 2^8421269 is an apocalyptic number.

8421269 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

8421269 is a deficient number, since it is larger than the sum of its proper divisors (94711).

8421269 is an equidigital number, since it uses as much as digits as its factorization.

8421269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94710.

The product of its digits is 6912, while the sum is 32.

The square root of 8421269 is about 2901.9422806114. The cubic root of 8421269 is about 203.4506960788.

The spelling of 8421269 in words is "eight million, four hundred twenty-one thousand, two hundred sixty-nine".