9551421 has 12 divisors (see below), whose sum is σ = 15050880. Its totient is φ = 5788680.

The previous prime is 9551413. The next prime is 9551429. The reversal of 9551421 is 1241559.

It is an interprime number because it is at equal distance from previous prime (9551413) and next prime (9551429).

It is not a de Polignac number, because 9551421 - 2³ = 9551413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9551429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48141 + ... + 48338.

It is an arithmetic number, because the mean of its divisors is an integer number (1254240).

Almost surely, 2^9551421 is an apocalyptic number.

It is an amenable number.

9551421 is a deficient number, since it is larger than the sum of its proper divisors (5499459).

9551421 is a wasteful number, since it uses less digits than its factorization.

9551421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96496 (or 96493 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 9551421 is about 3090.5373319214. The cubic root of 9551421 is about 212.1726151404.

The spelling of 9551421 in words is "nine million, five hundred fifty-one thousand, four hundred twenty-one".