1025640253 has 8 divisors (see below), whose sum is σ = 1123812000. Its totient is φ = 928290480.

The previous prime is 1025640233. The next prime is 1025640263. The reversal of 1025640253 is 3520465201.

1025640253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025640253 - 2¹⁷ = 1025509181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025640223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202878 + ... + 207871.

It is an arithmetic number, because the mean of its divisors is an integer number (140476500).

Almost surely, 2^1025640253 is an apocalyptic number.

It is an amenable number.

1025640253 is a deficient number, since it is larger than the sum of its proper divisors (98171747).

1025640253 is a wasteful number, since it uses less digits than its factorization.

1025640253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410987.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1025640253 is about 32025.6186981610. The cubic root of 1025640253 is about 1008.4747271126.

It can be divided in two parts, 1025 and 640253, that added together give a triangular number (641278 = T₁₁₃₂).

The spelling of 1025640253 in words is "one billion, twenty-five million, six hundred forty thousand, two hundred fifty-three".