1531420591 has 2 divisors, whose sum is σ = 1531420592. Its totient is φ = 1531420590.

The previous prime is 1531420567. The next prime is 1531420607. The reversal of 1531420591 is 1950241351.

It is a strong prime.

It is an emirp because it is prime and its reverse (1950241351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1531420591 - 2⁵ = 1531420559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531420511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765710295 + 765710296.

It is an arithmetic number, because the mean of its divisors is an integer number (765710296).

Almost surely, 2^1531420591 is an apocalyptic number.

1531420591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531420591 is an equidigital number, since it uses as much as digits as its factorization.

1531420591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1531420591 is about 39133.3692773827. The cubic root of 1531420591 is about 1152.6518740885.

The spelling of 1531420591 in words is "one billion, five hundred thirty-one million, four hundred twenty thousand, five hundred ninety-one".