1071355725 has 72 divisors (see below), whose sum is σ = 2216590272. Its totient is φ = 488870400.

The previous prime is 1071355723. The next prime is 1071355799. The reversal of 1071355725 is 5275531701.

It is a happy number.

1071355725 is a `hidden beast` number, since 10 + 71 + 3 + 5 + 572 + 5 = 666.

It is not a de Polignac number, because 1071355725 - 2¹ = 1071355723 is a prime.

It is a super-2 number, since 2×1071355725² = 2295606178980551250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1071355725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071355723) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29344 + ... + 54806.

It is an arithmetic number, because the mean of its divisors is an integer number (30785976).

Almost surely, 2^1071355725 is an apocalyptic number.

1071355725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1071355725 is an abundant number, since it is smaller than the sum of its proper divisors (1145234547).

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

1071355725 is a wasteful number, since it uses less digits than its factorization.

1071355725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25507 (or 25499 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 1071355725 is about 32731.5707689075. The cubic root of 1071355725 is about 1023.2409169926.

The spelling of 1071355725 in words is "one billion, seventy-one million, three hundred fifty-five thousand, seven hundred twenty-five".