1251205010 has 32 divisors (see below), whose sum is σ = 2459890944. Its totient is φ = 454432000.

The previous prime is 1251205009. The next prime is 1251205031. The reversal of 1251205010 is 105021521.

It is a super-3 number, since 3×1251205010³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251205010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90455 + ... + 103365.

It is an arithmetic number, because the mean of its divisors is an integer number (76871592).

Almost surely, 2^1251205010 is an apocalyptic number.

1251205010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251205010 is a deficient number, since it is larger than the sum of its proper divisors (1208685934).

1251205010 is a wasteful number, since it uses less digits than its factorization.

1251205010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13810.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1251205010 is about 35372.3763691387. The cubic root of 1251205010 is about 1077.5633825582.

Adding to 1251205010 its reverse (105021521), we get a palindrome (1356226531).

The spelling of 1251205010 in words is "one billion, two hundred fifty-one million, two hundred five thousand, ten".