71240953 has 6 divisors (see below), whose sum is σ = 82872186. Its totient is φ = 61063632.

The previous prime is 71240951. The next prime is 71240977. The reversal of 71240953 is 35904217.

It can be written as a sum of positive squares in only one way, i.e., 64128064 + 7112889 = 8008^2 + 2667^2 .

It is not a de Polignac number, because 71240953 - 2¹ = 71240951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71240951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 726900 + ... + 726997.

It is an arithmetic number, because the mean of its divisors is an integer number (13812031).

Almost surely, 2^71240953 is an apocalyptic number.

It is an amenable number.

71240953 is a deficient number, since it is larger than the sum of its proper divisors (11631233).

71240953 is a wasteful number, since it uses less digits than its factorization.

71240953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453911 (or 1453904 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 71240953 is about 8440.4355930248. The cubic root of 71240953 is about 414.5496697317.

The spelling of 71240953 in words is "seventy-one million, two hundred forty thousand, nine hundred fifty-three".