1421573 has 4 divisors (see below), whose sum is σ = 1423968. Its totient is φ = 1419180.

The previous prime is 1421569. The next prime is 1421603. The reversal of 1421573 is 3751241.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1421573 - 2² = 1421569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421543) 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, 440 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (355992).

2^1421573 is an apocalyptic number.

It is an amenable number.

1421573 is a deficient number, since it is larger than the sum of its proper divisors (2395).

1421573 is a wasteful number, since it uses less digits than its factorization.

1421573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394.

The product of its digits is 840, while the sum is 23.

The square root of 1421573 is about 1192.2973622381. The cubic root of 1421573 is about 112.4405743766.

The spelling of 1421573 in words is "one million, four hundred twenty-one thousand, five hundred seventy-three".