1251338066 has 8 divisors (see below), whose sum is σ = 2047644144. Its totient is φ = 568790020.

The previous prime is 1251338017. The next prime is 1251338083. The reversal of 1251338066 is 6608331521.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 28439480 + ... + 28439523.

It is an arithmetic number, because the mean of its divisors is an integer number (255955518).

Almost surely, 2^1251338066 is an apocalyptic number.

1251338066 is a deficient number, since it is larger than the sum of its proper divisors (796306078).

1251338066 is a wasteful number, since it uses less digits than its factorization.

1251338066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56879016.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1251338066 is about 35374.2571088072. The cubic root of 1251338066 is about 1077.6015780552.

Adding to 1251338066 its reverse (6608331521), we get a palindrome (7859669587).

The spelling of 1251338066 in words is "one billion, two hundred fifty-one million, three hundred thirty-eight thousand, sixty-six".