1025501513 has 4 divisors (see below), whose sum is σ = 1029756948. Its totient is φ = 1021246080.

The previous prime is 1025501501. The next prime is 1025501537. The reversal of 1025501513 is 3151055201.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 708198544 + 317302969 = 26612^2 + 17813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025501513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1025501563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127356 + ... + 2127837.

It is an arithmetic number, because the mean of its divisors is an integer number (257439237).

Almost surely, 2^1025501513 is an apocalyptic number.

It is an amenable number.

1025501513 is a deficient number, since it is larger than the sum of its proper divisors (4255435).

1025501513 is an equidigital number, since it uses as much as digits as its factorization.

1025501513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255434.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1025501513 is about 32023.4525465322. The cubic root of 1025501513 is about 1008.4292523981.

Adding to 1025501513 its reverse (3151055201), we get a palindrome (4176556714).

The spelling of 1025501513 in words is "one billion, twenty-five million, five hundred one thousand, five hundred thirteen".