71440725 has 24 divisors (see below), whose sum is σ = 118554912. Its totient is φ = 37960000.

The previous prime is 71440711. The next prime is 71440729. The reversal of 71440725 is 52704417.

It is not a de Polignac number, because 71440725 - 2⁸ = 71440469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71440692 and 71440701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20350 + ... + 23600.

It is an arithmetic number, because the mean of its divisors is an integer number (4939788).

Almost surely, 2^71440725 is an apocalyptic number.

71440725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71440725 is a deficient number, since it is larger than the sum of its proper divisors (47114187).

71440725 is a wasteful number, since it uses less digits than its factorization.

71440725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 71440725 is about 8452.2615316849. The cubic root of 71440725 is about 414.9367978460.

The spelling of 71440725 in words is "seventy-one million, four hundred forty thousand, seven hundred twenty-five".