1251258064 has 40 divisors (see below), whose sum is σ = 2829604608. Its totient is φ = 524841600.

The previous prime is 1251258059. The next prime is 1251258083. The reversal of 1251258064 is 4608521521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113587 + ... + 124114.

Almost surely, 2^1251258064 is an apocalyptic number.

1251258064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1251258064 is an abundant number, since it is smaller than the sum of its proper divisors (1578346544).

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

1251258064 is a wasteful number, since it uses less digits than its factorization.

1251258064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237763 (or 237757 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 1251258064 is about 35373.1262966676. The cubic root of 1251258064 is about 1077.5786127401.

Adding to 1251258064 its reverse (4608521521), we get a palindrome (5859779585).

The spelling of 1251258064 in words is "one billion, two hundred fifty-one million, two hundred fifty-eight thousand, sixty-four".