421236073 has 8 divisors (see below), whose sum is σ = 423761408. Its totient is φ = 418716864.

The previous prime is 421236001. The next prime is 421236077. The reversal of 421236073 is 370632124.

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 421236073 - 2¹³ = 421227881 is a prime.

It is a super-2 number, since 2×421236073² = 354879658392922658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421236077) 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, 236161 + ... + 237937.

It is an arithmetic number, because the mean of its divisors is an integer number (52970176).

Almost surely, 2^421236073 is an apocalyptic number.

It is an amenable number.

421236073 is a deficient number, since it is larger than the sum of its proper divisors (2525335).

421236073 is a wasteful number, since it uses less digits than its factorization.

421236073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 421236073 is about 20524.0364694667. The cubic root of 421236073 is about 749.6211852907.

Adding to 421236073 its reverse (370632124), we get a palindrome (791868197).

The spelling of 421236073 in words is "four hundred twenty-one million, two hundred thirty-six thousand, seventy-three".