1025520011 has 4 divisors (see below), whose sum is σ = 1060882800. Its totient is φ = 990157224.

The previous prime is 1025519981. The next prime is 1025520031. The reversal of 1025520011 is 1100255201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100255201 = 887 ⋅1240423.

It is a cyclic number.

It is not a de Polignac number, because 1025520011 - 2⁶ = 1025519947 is a prime.

It is a super-2 number, since 2×1025520011² = 2103382585922880242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025520031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17681351 + ... + 17681408.

It is an arithmetic number, because the mean of its divisors is an integer number (265220700).

Almost surely, 2^1025520011 is an apocalyptic number.

1025520011 is a deficient number, since it is larger than the sum of its proper divisors (35362789).

1025520011 is an equidigital number, since it uses as much as digits as its factorization.

1025520011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35362788.

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

The square root of 1025520011 is about 32023.7413648062. The cubic root of 1025520011 is about 1008.4353157118.

Adding to 1025520011 its reverse (1100255201), we get a palindrome (2125775212).

The spelling of 1025520011 in words is "one billion, twenty-five million, five hundred twenty thousand, eleven".