1431557 has 2 divisors, whose sum is σ = 1431558. Its totient is φ = 1431556.

The previous prime is 1431539. The next prime is 1431569. The reversal of 1431557 is 7551341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863041 + 568516 = 929^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431557 - 2¹⁶ = 1366021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715778 + 715779.

It is an arithmetic number, because the mean of its divisors is an integer number (715779).

2^1431557 is an apocalyptic number.

It is an amenable number.

1431557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431557 is an equidigital number, since it uses as much as digits as its factorization.

1431557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 26.

The square root of 1431557 is about 1196.4769116034. The cubic root of 1431557 is about 112.7031916327.

Adding to 1431557 its reverse (7551341), we get a palindrome (8982898).

The spelling of 1431557 in words is "one million, four hundred thirty-one thousand, five hundred fifty-seven".