1403531 has 2 divisors, whose sum is σ = 1403532. Its totient is φ = 1403530.

The previous prime is 1403491. The next prime is 1403533. The reversal of 1403531 is 1353041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1403531 - 2¹⁴ = 1387147 is a prime.

It is a super-2 number, since 2×1403531² = 3939798535922, which contains 22 as substring.

Together with 1403533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1403533) 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, 701765 + 701766.

It is an arithmetic number, because the mean of its divisors is an integer number (701766).

2^1403531 is an apocalyptic number.

1403531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403531 is an equidigital number, since it uses as much as digits as its factorization.

1403531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1403531 is about 1184.7071368064. The cubic root of 1403531 is about 111.9628650272.

Adding to 1403531 its reverse (1353041), we get a palindrome (2756572).

The spelling of 1403531 in words is "one million, four hundred three thousand, five hundred thirty-one".