1042421 has 4 divisors (see below), whose sum is σ = 1052844. Its totient is φ = 1032000.

The previous prime is 1042399. The next prime is 1042427. The reversal of 1042421 is 1242401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242401 = 101 ⋅12301.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 207025 = 914^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042421 - 2⁶ = 1042357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042396 and 1042405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042427) 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, 5060 + ... + 5261.

It is an arithmetic number, because the mean of its divisors is an integer number (263211).

2^1042421 is an apocalyptic number.

It is an amenable number.

1042421 is a deficient number, since it is larger than the sum of its proper divisors (10423).

1042421 is a wasteful number, since it uses less digits than its factorization.

1042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1042421 is about 1020.9902056337. The cubic root of 1042421 is about 101.3944967298.

Adding to 1042421 its reverse (1242401), we get a palindrome (2284822).

The spelling of 1042421 in words is "one million, forty-two thousand, four hundred twenty-one".