1000253257 has 4 divisors (see below), whose sum is σ = 1000624660. Its totient is φ = 999881856.

The previous prime is 1000253237. The next prime is 1000253273. The reversal of 1000253257 is 7523520001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7523520001 = 5503 ⋅1367167.

It can be written as a sum of positive squares in 2 ways, for example, as 922883641 + 77369616 = 30379^2 + 8796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000253257 - 2⁷ = 1000253129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000253237) 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, 181632 + ... + 187057.

It is an arithmetic number, because the mean of its divisors is an integer number (250156165).

Almost surely, 2^1000253257 is an apocalyptic number.

It is an amenable number.

1000253257 is a deficient number, since it is larger than the sum of its proper divisors (371403).

1000253257 is an equidigital number, since it uses as much as digits as its factorization.

1000253257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371402.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 1000253257 is about 31626.7806929507. The cubic root of 1000253257 is about 1000.0844118744.

Adding to 1000253257 its reverse (7523520001), we get a palindrome (8523773258).

The spelling of 1000253257 in words is "one billion, two hundred fifty-three thousand, two hundred fifty-seven".