1541232509 has 2 divisors, whose sum is σ = 1541232510. Its totient is φ = 1541232508.

The previous prime is 1541232493. The next prime is 1541232523. The reversal of 1541232509 is 9052321451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1366411225 + 174821284 = 36965^2 + 13222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1541232509 - 2⁴ = 1541232493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1541262509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770616254 + 770616255.

It is an arithmetic number, because the mean of its divisors is an integer number (770616255).

Almost surely, 2^1541232509 is an apocalyptic number.

It is an amenable number.

1541232509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541232509 is an equidigital number, since it uses as much as digits as its factorization.

1541232509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1541232509 is about 39258.5342186893. The cubic root of 1541232509 is about 1155.1083421291.

The spelling of 1541232509 in words is "one billion, five hundred forty-one million, two hundred thirty-two thousand, five hundred nine".