71502049 has 8 divisors (see below), whose sum is σ = 72170208. Its totient is φ = 70837440.

The previous prime is 71502037. The next prime is 71502071. The reversal of 71502049 is 94020517.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71502049 - 2⁹ = 71501537 is a prime.

It is a super-2 number, since 2×71502049² = 10225086022396802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71502349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54054 + ... + 55360.

It is an arithmetic number, because the mean of its divisors is an integer number (9021276).

Almost surely, 2^71502049 is an apocalyptic number.

It is an amenable number.

71502049 is a deficient number, since it is larger than the sum of its proper divisors (668159).

71502049 is a wasteful number, since it uses less digits than its factorization.

71502049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 71502049 is about 8455.8884216858. Note that the first 3 decimals coincide. The cubic root of 71502049 is about 415.0554897495.

The spelling of 71502049 in words is "seventy-one million, five hundred two thousand, forty-nine".