1023421 has 4 divisors (see below), whose sum is σ = 1169632. Its totient is φ = 877212.

The previous prime is 1023419. The next prime is 1023461. The reversal of 1023421 is 1243201.

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 1023421 - 2¹ = 1023419 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 (1023461) 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, 73095 + ... + 73108.

It is an arithmetic number, because the mean of its divisors is an integer number (292408).

2^1023421 is an apocalyptic number.

It is an amenable number.

1023421 is a deficient number, since it is larger than the sum of its proper divisors (146211).

1023421 is an equidigital number, since it uses as much as digits as its factorization.

1023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146210.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1023421 is about 1011.6427234948. The cubic root of 1023421 is about 100.7746831628.

Adding to 1023421 its reverse (1243201), we get a palindrome (2266622).

It can be divided in two parts, 1023 and 421, that added together give a square (1444 = 38²).

The spelling of 1023421 in words is "one million, twenty-three thousand, four hundred twenty-one".