1208704546921 has 3 divisors (see below), whose sum is σ = 1208705646333. Its totient is φ = 1208703447510.

The previous prime is 1208704546901. The next prime is 1208704547021. The reversal of 1208704546921 is 1296454078021.

The square root of 1208704546921 is 1099411.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1208704546921 - 2¹⁵ = 1208704514153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1208704546901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 549706 + ... + 1649116.

It is an arithmetic number, because the mean of its divisors is an integer number (402901882111).

Almost surely, 2^{1208704546921} is an apocalyptic number.

1208704546921 is the 1099411-st square number.

1208704546921 is the 549706-th centered octagonal number.

It is an amenable number.

1208704546921 is a deficient number, since it is larger than the sum of its proper divisors (1099412).

1208704546921 is an frugal number, since it uses more digits than its factorization.

1208704546921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198822 (or 1099411 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

Multiplying 1208704546921 by its sum of digits (49), we get a square (59226522799129 = 7695877²).

It can be divided in two parts, 1208704 and 546921, that added together give a square (1755625 = 1325²).

The spelling of 1208704546921 in words is "one trillion, two hundred eight billion, seven hundred four million, five hundred forty-six thousand, nine hundred twenty-one".