1012251513 has 32 divisors (see below), whose sum is σ = 1706043136. Its totient is φ = 519499008.

The previous prime is 1012251497. The next prime is 1012251517. The reversal of 1012251513 is 3151522101.

It is not a de Polignac number, because 1012251513 - 2⁴ = 1012251497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012251513.

It is not an unprimeable number, because it can be changed into a prime (1012251517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40006 + ... + 60207.

It is an arithmetic number, because the mean of its divisors is an integer number (53313848).

Almost surely, 2^1012251513 is an apocalyptic number.

1012251513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1012251513 is a deficient number, since it is larger than the sum of its proper divisors (693791623).

1012251513 is a wasteful number, since it uses less digits than its factorization.

1012251513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100273.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1012251513 is about 31815.9003172942. The cubic root of 1012251513 is about 1004.0672725329.

Adding to 1012251513 its reverse (3151522101), we get a palindrome (4163773614).

The spelling of 1012251513 in words is "one billion, twelve million, two hundred fifty-one thousand, five hundred thirteen".