1145250989 has 2 divisors, whose sum is σ = 1145250990. Its totient is φ = 1145250988.

The previous prime is 1145250979. The next prime is 1145251001. The reversal of 1145250989 is 9890525411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693900964 + 451350025 = 26342^2 + 21245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145250989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145250929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572625494 + 572625495.

It is an arithmetic number, because the mean of its divisors is an integer number (572625495).

Almost surely, 2^1145250989 is an apocalyptic number.

It is an amenable number.

1145250989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145250989 is an equidigital number, since it uses as much as digits as its factorization.

1145250989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 1145250989 is about 33841.5571302504. The cubic root of 1145250989 is about 1046.2453926343.

The spelling of 1145250989 in words is "one billion, one hundred forty-five million, two hundred fifty thousand, nine hundred eighty-nine".