71413245 has 20 divisors (see below), whose sum is σ = 128015580. Its totient is φ = 38086848.

The previous prime is 71413241. The next prime is 71413259. The reversal of 71413245 is 54231417.

71413245 is a `hidden beast` number, since 7 + 1 + 413 + 245 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17214201 + 54199044 = 4149^2 + 7362^2 .

It is not a de Polignac number, because 71413245 - 2² = 71413241 is a prime.

It is a super-2 number, since 2×71413245² = 10199703122860050, 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 not an unprimeable number, because it can be changed into a prime (71413241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87760 + ... + 88569.

It is an arithmetic number, because the mean of its divisors is an integer number (6400779).

Almost surely, 2^71413245 is an apocalyptic number.

It is an amenable number.

71413245 is a deficient number, since it is larger than the sum of its proper divisors (56602335).

71413245 is a wasteful number, since it uses less digits than its factorization.

71413245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176346 (or 176337 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 71413245 is about 8450.6357748988. The cubic root of 71413245 is about 414.8835885805.

The spelling of 71413245 in words is "seventy-one million, four hundred thirteen thousand, two hundred forty-five".