71401481 has 4 divisors (see below), whose sum is σ = 71428500. Its totient is φ = 71374464.

The previous prime is 71401471. The next prime is 71401483. The reversal of 71401481 is 18410417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18410417 = 47 ⋅391711.

It can be written as a sum of positive squares in 2 ways, for example, as 12250000 + 59151481 = 3500^2 + 7691^2 .

It is a cyclic number.

It is not a de Polignac number, because 71401481 - 2¹⁸ = 71139337 is a prime.

It is a super-2 number, since 2×71401481² = 10196342977986722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71401481.

It is not an unprimeable number, because it can be changed into a prime (71401483) 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, 9056 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (17857125).

Almost surely, 2^71401481 is an apocalyptic number.

It is an amenable number.

71401481 is a deficient number, since it is larger than the sum of its proper divisors (27019).

71401481 is a wasteful number, since it uses less digits than its factorization.

71401481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27018.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 71401481 is about 8449.9397039269. The cubic root of 71401481 is about 414.8608058854.

Adding to 71401481 its reverse (18410417), we get a palindrome (89811898).

The spelling of 71401481 in words is "seventy-one million, four hundred one thousand, four hundred eighty-one".