1421601 has 4 divisors (see below), whose sum is σ = 1895472. Its totient is φ = 947732.

The previous prime is 1421569. The next prime is 1421603. The reversal of 1421601 is 1061241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1061241 = 3 ⋅353747.

It is a cyclic number.

It is not a de Polignac number, because 1421601 - 2⁵ = 1421569 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1421603) 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, 236931 + ... + 236936.

It is an arithmetic number, because the mean of its divisors is an integer number (473868).

2^1421601 is an apocalyptic number.

It is an amenable number.

1421601 is a deficient number, since it is larger than the sum of its proper divisors (473871).

1421601 is an equidigital number, since it uses as much as digits as its factorization.

1421601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473870.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1421601 is about 1192.3091042175. The cubic root of 1421601 is about 112.4413126000.

Adding to 1421601 its reverse (1061241), we get a palindrome (2482842).

The spelling of 1421601 in words is "one million, four hundred twenty-one thousand, six hundred one".