71501378 has 8 divisors (see below), whose sum is σ = 115502268. Its totient is φ = 33000624.

The previous prime is 71501329. The next prime is 71501387. The reversal of 71501378 is 87310517.

It can be written as a sum of positive squares in 2 ways, for example, as 69272329 + 2229049 = 8323^2 + 1493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71501378² = 10224894111797768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375001 + ... + 1375052.

Almost surely, 2^71501378 is an apocalyptic number.

71501378 is a deficient number, since it is larger than the sum of its proper divisors (44000890).

71501378 is a wasteful number, since it uses less digits than its factorization.

71501378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750068.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 71501378 is about 8455.8487450995. The cubic root of 71501378 is about 415.0541914040.

The spelling of 71501378 in words is "seventy-one million, five hundred one thousand, three hundred seventy-eight".