1245381143 has 2 divisors, whose sum is σ = 1245381144. Its totient is φ = 1245381142.

The previous prime is 1245381139. The next prime is 1245381149. The reversal of 1245381143 is 3411835421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245381143 - 2² = 1245381139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245381149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622690571 + 622690572.

It is an arithmetic number, because the mean of its divisors is an integer number (622690572).

Almost surely, 2^1245381143 is an apocalyptic number.

1245381143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245381143 is an equidigital number, since it uses as much as digits as its factorization.

1245381143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 1245381143 is about 35289.9581042540. The cubic root of 1245381143 is about 1075.8889040023. Note that the first 3 decimals are identical.

The spelling of 1245381143 in words is "one billion, two hundred forty-five million, three hundred eighty-one thousand, one hundred forty-three".