1442421 has 16 divisors (see below), whose sum is σ = 2190720. Its totient is φ = 937440.

The previous prime is 1442411. The next prime is 1442429. The reversal of 1442421 is 1242441.

1442421 = 90² + 91² + ... + 171².

It is not a de Polignac number, because 1442421 - 2¹³ = 1434229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1442394 and 1442403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456 + ... + 1758.

It is an arithmetic number, because the mean of its divisors is an integer number (136920).

2^1442421 is an apocalyptic number.

It is an amenable number.

1442421 is a deficient number, since it is larger than the sum of its proper divisors (748299).

1442421 is a wasteful number, since it uses less digits than its factorization.

1442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1347 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 1442421 is about 1201.0083263658. The cubic root of 1442421 is about 112.9875727060.

Adding to 1442421 its reverse (1242441), we get a palindrome (2684862).

The spelling of 1442421 in words is "one million, four hundred forty-two thousand, four hundred twenty-one".