9190421 has 4 divisors (see below), whose sum is σ = 9731052. Its totient is φ = 8649792.

The previous prime is 9190411. The next prime is 9190463. The reversal of 9190421 is 1240919.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6180196 + 3010225 = 2486^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 9190421 - 2¹⁸ = 8928277 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 (9190411) 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, 270290 + ... + 270323.

It is an arithmetic number, because the mean of its divisors is an integer number (2432763).

Almost surely, 2^9190421 is an apocalyptic number.

It is an amenable number.

9190421 is a deficient number, since it is larger than the sum of its proper divisors (540631).

9190421 is a wasteful number, since it uses less digits than its factorization.

9190421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540630.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 9190421 is about 3031.5707149925. The cubic root of 9190421 is about 209.4651620595.

The spelling of 9190421 in words is "nine million, one hundred ninety thousand, four hundred twenty-one".