1053701721 has 6 divisors (see below), whose sum is σ = 1522013610. Its totient is φ = 702467808.

The previous prime is 1053701657. The next prime is 1053701729. The reversal of 1053701721 is 1271073501.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 765075600 + 288626121 = 27660^2 + 16989^2 .

It is not a de Polignac number, because 1053701721 - 2⁶ = 1053701657 is a prime.

It is a super-2 number, since 2×1053701721² = 2220574633676723682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1053701729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58538976 + ... + 58538993.

It is an arithmetic number, because the mean of its divisors is an integer number (253668935).

Almost surely, 2^1053701721 is an apocalyptic number.

It is an amenable number.

1053701721 is a deficient number, since it is larger than the sum of its proper divisors (468311889).

1053701721 is a wasteful number, since it uses less digits than its factorization.

1053701721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117077975 (or 117077972 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 1053701721 is about 32460.7720333328. The cubic root of 1053701721 is about 1017.5893736328.

The spelling of 1053701721 in words is "one billion, fifty-three million, seven hundred one thousand, seven hundred twenty-one".