1421559 has 6 divisors (see below), whose sum is σ = 2053376. Its totient is φ = 947700.

The previous prime is 1421549. The next prime is 1421569. The reversal of 1421559 is 9551241.

1421559 = 135² + 136² + ... + 188².

It is an interprime number because it is at equal distance from previous prime (1421549) and next prime (1421569).

It is not a de Polignac number, because 1421559 - 2⁴ = 1421543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78967 + ... + 78984.

2^1421559 is an apocalyptic number.

1421559 is a deficient number, since it is larger than the sum of its proper divisors (631817).

1421559 is a wasteful number, since it uses less digits than its factorization.

1421559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157957 (or 157954 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1421559 is about 1192.2914912051. The cubic root of 1421559 is about 112.4402052612.

The spelling of 1421559 in words is "one million, four hundred twenty-one thousand, five hundred fifty-nine".