1020561126253 has 8 divisors (see below), whose sum is σ = 1074284143200. Its totient is φ = 966839036688.

The previous prime is 1020561126229. The next prime is 1020561126281. The reversal of 1020561126253 is 3526211650201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020561126253 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 (1020561126353) 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, 4174950 + ... + 4412632.

It is an arithmetic number, because the mean of its divisors is an integer number (134285517900).

Almost surely, 2^{1020561126253} is an apocalyptic number.

It is an amenable number.

1020561126253 is a deficient number, since it is larger than the sum of its proper divisors (53723016947).

1020561126253 is a wasteful number, since it uses less digits than its factorization.

1020561126253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463691.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 1020561126253 its reverse (3526211650201), we get a palindrome (4546772776454).

The spelling of 1020561126253 in words is "one trillion, twenty billion, five hundred sixty-one million, one hundred twenty-six thousand, two hundred fifty-three".