1012421 has 2 divisors, whose sum is σ = 1012422. Its totient is φ = 1012420.

The previous prime is 1012411. The next prime is 1012423. The reversal of 1012421 is 1242101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 264196 = 865^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012421 - 2¹⁰ = 1011397 is a prime.

It is a Sophie Germain prime.

Together with 1012423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506210 + 506211.

It is an arithmetic number, because the mean of its divisors is an integer number (506211).

2^1012421 is an apocalyptic number.

It is an amenable number.

1012421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012421 is an equidigital number, since it uses as much as digits as its factorization.

1012421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1012421 is about 1006.1913336935. The cubic root of 1012421 is about 100.4123308294.

Adding to 1012421 its reverse (1242101), we get a palindrome (2254522).

The spelling of 1012421 in words is "one million, twelve thousand, four hundred twenty-one".