1358421 has 4 divisors (see below), whose sum is σ = 1811232. Its totient is φ = 905612.

The previous prime is 1358417. The next prime is 1358437. The reversal of 1358421 is 1248531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1358421 - 2² = 1358417 is a prime.

It is a super-2 number, since 2×1358421² = 3690615226482, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

1358421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1358391 and 1358400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1358411) 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 3 ways as a sum of consecutive naturals, for example, 226401 + ... + 226406.

It is an arithmetic number, because the mean of its divisors is an integer number (452808).

2^1358421 is an apocalyptic number.

It is an amenable number.

1358421 is a deficient number, since it is larger than the sum of its proper divisors (452811).

1358421 is an equidigital number, since it uses as much as digits as its factorization.

1358421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452810.

The product of its digits is 960, while the sum is 24.

The square root of 1358421 is about 1165.5131916885. The cubic root of 1358421 is about 110.7502704890.

The spelling of 1358421 in words is "one million, three hundred fifty-eight thousand, four hundred twenty-one".