1251145430 has 32 divisors (see below), whose sum is σ = 2461466880. Its totient is φ = 455823360.

The previous prime is 1251145411. The next prime is 1251145433. The reversal of 1251145430 is 345411521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251145430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251145433) by changing a digit.

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, 113435 + ... + 123974.

It is an arithmetic number, because the mean of its divisors is an integer number (76920840).

Almost surely, 2^1251145430 is an apocalyptic number.

1251145430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251145430 is a deficient number, since it is larger than the sum of its proper divisors (1210321450).

1251145430 is a wasteful number, since it uses less digits than its factorization.

1251145430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237464.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1251145430 is about 35371.5341765098. The cubic root of 1251145430 is about 1077.5462784479.

Adding to 1251145430 its reverse (345411521), we get a palindrome (1596556951).

The spelling of 1251145430 in words is "one billion, two hundred fifty-one million, one hundred forty-five thousand, four hundred thirty".