1012545251 has 4 divisors (see below), whose sum is σ = 1015843752. Its totient is φ = 1009246752.

The previous prime is 1012545239. The next prime is 1012545263. The reversal of 1012545251 is 1525452101.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1012545239) and next prime (1012545263).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012545251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012545251.

It is not an unprimeable number, because it can be changed into a prime (1012545221) 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 3 ways as a sum of consecutive naturals, for example, 1648790 + ... + 1649403.

It is an arithmetic number, because the mean of its divisors is an integer number (253960938).

Almost surely, 2^1012545251 is an apocalyptic number.

1012545251 is a deficient number, since it is larger than the sum of its proper divisors (3298501).

1012545251 is an equidigital number, since it uses as much as digits as its factorization.

1012545251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298500.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1012545251 is about 31820.5161963159. The cubic root of 1012545251 is about 1004.1643841648.

Adding to 1012545251 its reverse (1525452101), we get a palindrome (2537997352).

The spelling of 1012545251 in words is "one billion, twelve million, five hundred forty-five thousand, two hundred fifty-one".