1542881 has 2 divisors, whose sum is σ = 1542882. Its totient is φ = 1542880.

The previous prime is 1542851. The next prime is 1542889. The reversal of 1542881 is 1882451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 512656 = 1015^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542881 - 2¹⁸ = 1280737 is a prime.

It is a super-2 number, since 2×1542881² = 4760963560322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1542889) 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 as a sum of consecutive naturals, namely, 771440 + 771441.

It is an arithmetic number, because the mean of its divisors is an integer number (771441).

2^1542881 is an apocalyptic number.

It is an amenable number.

1542881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542881 is an equidigital number, since it uses as much as digits as its factorization.

1542881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 29.

The square root of 1542881 is about 1242.1276101915. The cubic root of 1542881 is about 115.5520027192.

The spelling of 1542881 in words is "one million, five hundred forty-two thousand, eight hundred eighty-one".