1503881 has 2 divisors, whose sum is σ = 1503882. Its totient is φ = 1503880.

The previous prime is 1503863. The next prime is 1503883. The reversal of 1503881 is 1883051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 313600 = 1091^2 + 560^2 .

It is an emirp because it is prime and its reverse (1883051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1503881 is a prime.

It is a super-2 number, since 2×1503881² = 4523316124322, which contains 22 as substring.

Together with 1503883, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1503881.

It is not a weakly prime, because it can be changed into another prime (1503883) 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, 751940 + 751941.

It is an arithmetic number, because the mean of its divisors is an integer number (751941).

2^1503881 is an apocalyptic number.

1503881 is the 656-th centered heptagonal number.

It is an amenable number.

1503881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1503881 is an equidigital number, since it uses as much as digits as its factorization.

1503881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1503881 is about 1226.3282594803. The cubic root of 1503881 is about 114.5700644764.

The spelling of 1503881 in words is "one million, five hundred three thousand, eight hundred eighty-one".