71240155 has 8 divisors (see below), whose sum is σ = 97700832. Its totient is φ = 48850368.

The previous prime is 71240129. The next prime is 71240161. The reversal of 71240155 is 55104217.

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

It is not a de Polignac number, because 71240155 - 2⁵ = 71240123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017682 + ... + 1017751.

It is an arithmetic number, because the mean of its divisors is an integer number (12212604).

Almost surely, 2^71240155 is an apocalyptic number.

71240155 is a deficient number, since it is larger than the sum of its proper divisors (26460677).

71240155 is a wasteful number, since it uses less digits than its factorization.

71240155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035445.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 71240155 is about 8440.3883204507. The cubic root of 71240155 is about 414.5481218773.

The spelling of 71240155 in words is "seventy-one million, two hundred forty thousand, one hundred fifty-five".