421151421 has 8 divisors (see below), whose sum is σ = 594566784. Its totient is φ = 264251840.

The previous prime is 421151411. The next prime is 421151429. The reversal of 421151421 is 124151124.

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 421151421 - 2⁵ = 421151389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421151429) 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, 4128885 + ... + 4128986.

It is an arithmetic number, because the mean of its divisors is an integer number (74320848).

Almost surely, 2^421151421 is an apocalyptic number.

It is an amenable number.

421151421 is a deficient number, since it is larger than the sum of its proper divisors (173415363).

421151421 is a wasteful number, since it uses less digits than its factorization.

421151421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257891.

The product of its digits is 320, while the sum is 21.

The square root of 421151421 is about 20521.9741009485. The cubic root of 421151421 is about 749.5709670656.

The spelling of 421151421 in words is "four hundred twenty-one million, one hundred fifty-one thousand, four hundred twenty-one".