1721612252 has 12 divisors (see below), whose sum is σ = 3019687440. Its totient is φ = 858844416.

The previous prime is 1721612227. The next prime is 1721612267. The reversal of 1721612252 is 2522161271.

It is a happy number.

It is a congruent number.

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, 488453 + ... + 491964.

It is an arithmetic number, because the mean of its divisors is an integer number (251640620).

Almost surely, 2^1721612252 is an apocalyptic number.

It is an amenable number.

1721612252 is a deficient number, since it is larger than the sum of its proper divisors (1298075188).

1721612252 is a wasteful number, since it uses less digits than its factorization.

1721612252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980860 (or 980858 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 1721612252 is about 41492.3155777067. The cubic root of 1721612252 is about 1198.5195288852.

The spelling of 1721612252 in words is "one billion, seven hundred twenty-one million, six hundred twelve thousand, two hundred fifty-two".