1061217684 has 18 divisors (see below), whose sum is σ = 2682522570. Its totient is φ = 353739216.

The previous prime is 1061217667. The next prime is 1061217721. The reversal of 1061217684 is 4867121601.

It is a happy number.

1061217684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 616429584 + 444788100 = 24828^2 + 21090^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1061217684² = 2252365945668647712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 29478269 = 1061217684 / (1 + 0 + 6 + 1 + 2 + 1 + 7 + 6 + 8 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14739099 + ... + 14739170.

Almost surely, 2^1061217684 is an apocalyptic number.

It is an amenable number.

1061217684 is an abundant number, since it is smaller than the sum of its proper divisors (1621304886).

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

1061217684 is a wasteful number, since it uses less digits than its factorization.

1061217684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29478279 (or 29478274 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1061217684 is about 32576.3362580877. The cubic root of 1061217684 is about 1020.0031026434.

The spelling of 1061217684 in words is "one billion, sixty-one million, two hundred seventeen thousand, six hundred eighty-four".