1020506203261 has 8 divisors (see below), whose sum is σ = 1023003997920. Its totient is φ = 1018011344592.

The previous prime is 1020506203253. The next prime is 1020506203273. The reversal of 1020506203261 is 1623026050201.

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 1020506203261 - 2³ = 1020506203253 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 (1020506207261) 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, 37170 + ... + 1429123.

It is an arithmetic number, because the mean of its divisors is an integer number (127875499740).

Almost surely, 2^{1020506203261} is an apocalyptic number.

It is an amenable number.

1020506203261 is a deficient number, since it is larger than the sum of its proper divisors (2497794659).

1020506203261 is a wasteful number, since it uses less digits than its factorization.

1020506203261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467995.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 1020506203261 in words is "one trillion, twenty billion, five hundred six million, two hundred three thousand, two hundred sixty-one".