71401501 has 2 divisors, whose sum is σ = 71401502. Its totient is φ = 71401500.

The previous prime is 71401493. The next prime is 71401553. The reversal of 71401501 is 10510417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68873401 + 2528100 = 8299^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 71401501 - 2³ = 71401493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71401571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35700750 + 35700751.

It is an arithmetic number, because the mean of its divisors is an integer number (35700751).

Almost surely, 2^71401501 is an apocalyptic number.

It is an amenable number.

71401501 is a deficient number, since it is larger than the sum of its proper divisors (1).

71401501 is an equidigital number, since it uses as much as digits as its factorization.

71401501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 71401501 is about 8449.9408873672. The cubic root of 71401501 is about 414.8608446204.

Adding to 71401501 its reverse (10510417), we get a palindrome (81911918).

The spelling of 71401501 in words is "seventy-one million, four hundred one thousand, five hundred one".