71042401 has 4 divisors (see below), whose sum is σ = 71145904. Its totient is φ = 70938900.

The previous prime is 71042383. The next prime is 71042429. The reversal of 71042401 is 10424017.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10424017 = 43 ⋅242419.

It is a cyclic number.

It is not a de Polignac number, because 71042401 - 2¹⁵ = 71009633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71042471) 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, 50715 + ... + 52096.

It is an arithmetic number, because the mean of its divisors is an integer number (17786476).

Almost surely, 2^71042401 is an apocalyptic number.

It is an amenable number.

71042401 is a deficient number, since it is larger than the sum of its proper divisors (103503).

71042401 is a wasteful number, since it uses less digits than its factorization.

71042401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103502.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 71042401 is about 8428.6654341005. The cubic root of 71042401 is about 414.1641880287.

Adding to 71042401 its reverse (10424017), we get a palindrome (81466418).

The spelling of 71042401 in words is "seventy-one million, forty-two thousand, four hundred one".