1421575 has 12 divisors (see below), whose sum is σ = 1783368. Its totient is φ = 1124000.

The previous prime is 1421569. The next prime is 1421603. The reversal of 1421575 is 5751241.

1421575 = 65² + 66² + ... + 165².

It is not a de Polignac number, because 1421575 - 2⁵ = 1421543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2244 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (148614).

2^1421575 is an apocalyptic number.

1421575 is a deficient number, since it is larger than the sum of its proper divisors (361793).

1421575 is a wasteful number, since it uses less digits than its factorization.

1421575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 669 counting only the distinct ones).

The product of its digits is 1400, while the sum is 25.

The square root of 1421575 is about 1192.2982009548. The cubic root of 1421575 is about 112.4406271071.

The spelling of 1421575 in words is "one million, four hundred twenty-one thousand, five hundred seventy-five".