1251256006 has 64 divisors (see below), whose sum is σ = 2542772736. Its totient is φ = 445939200.

The previous prime is 1251255991. The next prime is 1251256031. The reversal of 1251256006 is 6006521521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223461 + ... + 228991.

It is an arithmetic number, because the mean of its divisors is an integer number (39730824).

Almost surely, 2^1251256006 is an apocalyptic number.

1251256006 is an abundant number, since it is smaller than the sum of its proper divisors (1291516730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251256006 is a wasteful number, since it uses less digits than its factorization.

1251256006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1251256006 is about 35373.0972067757. The cubic root of 1251256006 is about 1077.5780219592.

Adding to 1251256006 its reverse (6006521521), we get a palindrome (7257777527).

It can be divided in two parts, 125125 and 6006, that added together give a palindrome (131131).

The spelling of 1251256006 in words is "one billion, two hundred fifty-one million, two hundred fifty-six thousand, six".