1245534391 has 2 divisors, whose sum is σ = 1245534392. Its totient is φ = 1245534390.

The previous prime is 1245534373. The next prime is 1245534403. The reversal of 1245534391 is 1934355421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245534391 - 2¹⁷ = 1245403319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245534391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245534371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622767195 + 622767196.

It is an arithmetic number, because the mean of its divisors is an integer number (622767196).

Almost surely, 2^1245534391 is an apocalyptic number.

1245534391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245534391 is an equidigital number, since it uses as much as digits as its factorization.

1245534391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 1245534391 is about 35292.1293066882. The cubic root of 1245534391 is about 1075.9330326776.

The spelling of 1245534391 in words is "one billion, two hundred forty-five million, five hundred thirty-four thousand, three hundred ninety-one".