1721169952 has 24 divisors (see below), whose sum is σ = 3505401900. Its totient is φ = 830909184.

The previous prime is 1721169949. The next prime is 1721169977. The reversal of 1721169952 is 2599611271.

It can be written as a sum of positive squares in 2 ways, for example, as 1691183376 + 29986576 = 41124^2 + 5476^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1721169899 and 1721169908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926427 + ... + 928282.

Almost surely, 2^1721169952 is an apocalyptic number.

It is an amenable number.

1721169952 is an abundant number, since it is smaller than the sum of its proper divisors (1784231948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721169952 is a wasteful number, since it uses less digits than its factorization.

1721169952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854748 (or 1854740 counting only the distinct ones).

The product of its digits is 68040, while the sum is 43.

The square root of 1721169952 is about 41486.9853327522. The cubic root of 1721169952 is about 1198.4168827386.

The spelling of 1721169952 in words is "one billion, seven hundred twenty-one million, one hundred sixty-nine thousand, nine hundred fifty-two".