1259253668 has 12 divisors (see below), whose sum is σ = 2217731292. Its totient is φ = 625616160.

The previous prime is 1259253643. The next prime is 1259253707. The reversal of 1259253668 is 8663529521.

It can be written as a sum of positive squares in 2 ways, for example, as 559227904 + 700025764 = 23648^2 + 26458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001963 + ... + 1003218.

It is an arithmetic number, because the mean of its divisors is an integer number (184810941).

Almost surely, 2^1259253668 is an apocalyptic number.

It is an amenable number.

1259253668 is a deficient number, since it is larger than the sum of its proper divisors (958477624).

1259253668 is a wasteful number, since it uses less digits than its factorization.

1259253668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005342 (or 2005340 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 1259253668 is about 35485.9643803011. The cubic root of 1259253668 is about 1079.8690021726.

The spelling of 1259253668 in words is "one billion, two hundred fifty-nine million, two hundred fifty-three thousand, six hundred sixty-eight".