412721421 has 16 divisors (see below), whose sum is σ = 645907584. Its totient is φ = 229466304.

The previous prime is 412721411. The next prime is 412721431. The reversal of 412721421 is 124127214.

It is an interprime number because it is at equal distance from previous prime (412721411) and next prime (412721431).

It is not a de Polignac number, because 412721421 - 2⁵ = 412721389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 412721391 and 412721400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412721411) 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, 264810 + ... + 266363.

It is an arithmetic number, because the mean of its divisors is an integer number (40369224).

Almost surely, 2^412721421 is an apocalyptic number.

It is an amenable number.

412721421 is a deficient number, since it is larger than the sum of its proper divisors (233186163).

412721421 is a wasteful number, since it uses less digits than its factorization.

412721421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531220.

The product of its digits is 896, while the sum is 24.

The square root of 412721421 is about 20315.5462884954. The cubic root of 412721421 is about 744.5359457086.

Adding to 412721421 its reverse (124127214), we get a palindrome (536848635).

The spelling of 412721421 in words is "four hundred twelve million, seven hundred twenty-one thousand, four hundred twenty-one".