1025421 has 8 divisors (see below), whose sum is σ = 1399200. Its totient is φ = 667632.

The previous prime is 1025419. The next prime is 1025443. The reversal of 1025421 is 1245201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1025421 - 2¹ = 1025419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025021) 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, 3846 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (174900).

2^1025421 is an apocalyptic number.

It is an amenable number.

1025421 is a deficient number, since it is larger than the sum of its proper divisors (373779).

1025421 is an equidigital number, since it uses as much as digits as its factorization.

1025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1025421 is about 1012.6307323008. The cubic root of 1025421 is about 100.8402860827.

The spelling of 1025421 in words is "one million, twenty-five thousand, four hundred twenty-one".