78241271 has 4 divisors (see below), whose sum is σ = 78857472. Its totient is φ = 77625072.

The previous prime is 78241253. The next prime is 78241279. The reversal of 78241271 is 17214287.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78241271 - 2¹⁸ = 77979127 is a prime.

It is a super-2 number, since 2×78241271² = 12243392975390882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78241279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307910 + ... + 308163.

It is an arithmetic number, because the mean of its divisors is an integer number (19714368).

Almost surely, 2^78241271 is an apocalyptic number.

78241271 is a deficient number, since it is larger than the sum of its proper divisors (616201).

78241271 is a wasteful number, since it uses less digits than its factorization.

78241271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616200.

The product of its digits is 6272, while the sum is 32.

The square root of 78241271 is about 8845.4096004651. The cubic root of 78241271 is about 427.7059568686.

The spelling of 78241271 in words is "seventy-eight million, two hundred forty-one thousand, two hundred seventy-one".