1025513 has 2 divisors, whose sum is σ = 1025514. Its totient is φ = 1025512.

The previous prime is 1025509. The next prime is 1025537. The reversal of 1025513 is 3155201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 1369 = 1012^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025513 - 2² = 1025509 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1025491 and 1025500.

It is not a weakly prime, because it can be changed into another prime (1025503) 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 as a sum of consecutive naturals, namely, 512756 + 512757.

It is an arithmetic number, because the mean of its divisors is an integer number (512757).

2^1025513 is an apocalyptic number.

It is an amenable number.

1025513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025513 is an equidigital number, since it uses as much as digits as its factorization.

1025513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1025513 is about 1012.6761575153. The cubic root of 1025513 is about 100.8433017640.

It can be divided in two parts, 1025 and 513, that multiplied together give a triangular number (525825 = T₁₀₂₅).

The spelling of 1025513 in words is "one million, twenty-five thousand, five hundred thirteen".