1071721125 has 112 divisors (see below), whose sum is σ = 2114299200. Its totient is φ = 540626400.

The previous prime is 1071721081. The next prime is 1071721153. The reversal of 1071721125 is 5211271701.

It is not a de Polignac number, because 1071721125 - 2¹⁰ = 1071720101 is a prime.

It is a super-2 number, since 2×1071721125² = 2297172339542531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1731066 + ... + 1731684.

Almost surely, 2^1071721125 is an apocalyptic number.

1071721125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1071721125 is a deficient number, since it is larger than the sum of its proper divisors (1042578075).

1071721125 is an frugal number, since it uses more digits than its factorization.

1071721125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 27.

The square root of 1071721125 is about 32737.1520600067. The cubic root of 1071721125 is about 1023.3572337066.

Adding to 1071721125 its reverse (5211271701), we get a palindrome (6282992826).

The spelling of 1071721125 in words is "one billion, seventy-one million, seven hundred twenty-one thousand, one hundred twenty-five".