1531487 has 2 divisors, whose sum is σ = 1531488. Its totient is φ = 1531486.

The previous prime is 1531477. The next prime is 1531499. The reversal of 1531487 is 7841351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1531487 - 2¹⁸ = 1269343 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 (1531447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765743 + 765744.

It is an arithmetic number, because the mean of its divisors is an integer number (765744).

2^1531487 is an apocalyptic number.

1531487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531487 is an equidigital number, since it uses as much as digits as its factorization.

1531487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 1531487 is about 1237.5326258325. The cubic root of 1531487 is about 115.2668535166.

The spelling of 1531487 in words is "one million, five hundred thirty-one thousand, four hundred eighty-seven".