421037409 has 16 divisors (see below), whose sum is σ = 605192000. Its totient is φ = 258831936.

The previous prime is 421037369. The next prime is 421037429. The reversal of 421037409 is 904730124.

It is a happy number.

It is not a de Polignac number, because 421037409 - 2⁹ = 421036897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421037429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36642 + ... + 46740.

It is an arithmetic number, because the mean of its divisors is an integer number (37824500).

Almost surely, 2^421037409 is an apocalyptic number.

It is an amenable number.

421037409 is a deficient number, since it is larger than the sum of its proper divisors (184154591).

421037409 is a wasteful number, since it uses less digits than its factorization.

421037409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11184.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 421037409 is about 20519.1961099844. The cubic root of 421037409 is about 749.5033209303.

The spelling of 421037409 in words is "four hundred twenty-one million, thirty-seven thousand, four hundred nine".