1039421 has 2 divisors, whose sum is σ = 1039422. Its totient is φ = 1039420.

The previous prime is 1039387. The next prime is 1039427. The reversal of 1039421 is 1249301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 19321 = 1010^2 + 139^2 .

It is an emirp because it is prime and its reverse (1249301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1039421 - 2¹⁴ = 1023037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1039393 and 1039402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1039427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519710 + 519711.

It is an arithmetic number, because the mean of its divisors is an integer number (519711).

2^1039421 is an apocalyptic number.

It is an amenable number.

1039421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039421 is an equidigital number, since it uses as much as digits as its factorization.

1039421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1039421 is about 1019.5199850910. The cubic root of 1039421 is about 101.2971349913.

The spelling of 1039421 in words is "one million, thirty-nine thousand, four hundred twenty-one".