1457421 has 8 divisors (see below), whose sum is σ = 2220864. Its totient is φ = 832800.

The previous prime is 1457419. The next prime is 1457429. The reversal of 1457421 is 1247541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1457421 - 2¹ = 1457419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1457391 and 1457400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1457429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34680 + ... + 34721.

It is an arithmetic number, because the mean of its divisors is an integer number (277608).

2^1457421 is an apocalyptic number.

It is an amenable number.

1457421 is a deficient number, since it is larger than the sum of its proper divisors (763443).

1457421 is an equidigital number, since it uses as much as digits as its factorization.

1457421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69411.

The product of its digits is 1120, while the sum is 24.

The square root of 1457421 is about 1207.2369278646. The cubic root of 1457421 is about 113.3778823326.

Adding to 1457421 its product of digits (1120), we get a palindrome (1458541).

The spelling of 1457421 in words is "one million, four hundred fifty-seven thousand, four hundred twenty-one".