9451421 has 4 divisors (see below), whose sum is σ = 10801632. Its totient is φ = 8101212.

The previous prime is 9451381. The next prime is 9451423. The reversal of 9451421 is 1241549.

9451421 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9451421 - 2²² = 5257117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9451423) 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, 675095 + ... + 675108.

It is an arithmetic number, because the mean of its divisors is an integer number (2700408).

Almost surely, 2^9451421 is an apocalyptic number.

It is an amenable number.

9451421 is a deficient number, since it is larger than the sum of its proper divisors (1350211).

9451421 is a wasteful number, since it uses less digits than its factorization.

9451421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350210.

The product of its digits is 1440, while the sum is 26.

The square root of 9451421 is about 3074.3163467672. The cubic root of 9451421 is about 211.4295584800.

It can be divided in two parts, 94 and 51421, that added together give a palindrome (51515).

The spelling of 9451421 in words is "nine million, four hundred fifty-one thousand, four hundred twenty-one".