1011253025 has 6 divisors (see below), whose sum is σ = 1253953782. Its totient is φ = 809002400.

The previous prime is 1011253021. The next prime is 1011253049. The reversal of 1011253025 is 5203521101.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11175649 + 1000077376 = 3343^2 + 31624^2 .

It is not a de Polignac number, because 1011253025 - 2² = 1011253021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011252988 and 1011253006.

It is not an unprimeable number, because it can be changed into a prime (1011253021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20225036 + ... + 20225085.

It is an arithmetic number, because the mean of its divisors is an integer number (208992297).

Almost surely, 2^1011253025 is an apocalyptic number.

It is an amenable number.

1011253025 is a deficient number, since it is larger than the sum of its proper divisors (242700757).

1011253025 is an equidigital number, since it uses as much as digits as its factorization.

1011253025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40450131 (or 40450126 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1011253025 is about 31800.2047949380. The cubic root of 1011253025 is about 1003.7370255769.

Adding to 1011253025 its reverse (5203521101), we get a palindrome (6214774126).

The spelling of 1011253025 in words is "one billion, eleven million, two hundred fifty-three thousand, twenty-five".