71151261 has 4 divisors (see below), whose sum is σ = 94868352. Its totient is φ = 47434172.

The previous prime is 71151251. The next prime is 71151263. The reversal of 71151261 is 16215117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71151261 - 2⁵ = 71151229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71151263) 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, 11858541 + ... + 11858546.

It is an arithmetic number, because the mean of its divisors is an integer number (23717088).

Almost surely, 2^71151261 is an apocalyptic number.

It is an amenable number.

71151261 is a deficient number, since it is larger than the sum of its proper divisors (23717091).

71151261 is a wasteful number, since it uses less digits than its factorization.

71151261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23717090.

The product of its digits is 420, while the sum is 24.

The square root of 71151261 is about 8435.1206867478. The cubic root of 71151261 is about 414.3756246905.

Adding to 71151261 its reverse (16215117), we get a palindrome (87366378).

The spelling of 71151261 in words is "seventy-one million, one hundred fifty-one thousand, two hundred sixty-one".