1423557 has 12 divisors (see below), whose sum is σ = 2090764. Its totient is φ = 933120.

The previous prime is 1423553. The next prime is 1423579. The reversal of 1423557 is 7553241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 1052676 = 609^2 + 1026^2 .

It is not a de Polignac number, because 1423557 - 2² = 1423553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1423557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423553) 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 11 ways as a sum of consecutive naturals, for example, 748 + ... + 1845.

2^1423557 is an apocalyptic number.

It is an amenable number.

1423557 is a deficient number, since it is larger than the sum of its proper divisors (667207).

1423557 is a wasteful number, since it uses less digits than its factorization.

1423557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660 (or 2657 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 1423557 is about 1193.1290793539. The cubic root of 1423557 is about 112.4928588060.

Adding to 1423557 its reverse (7553241), we get a palindrome (8976798).

The spelling of 1423557 in words is "one million, four hundred twenty-three thousand, five hundred fifty-seven".