71420915 has 16 divisors (see below), whose sum is σ = 88646400. Its totient is φ = 55198080.

The previous prime is 71420897. The next prime is 71420929. The reversal of 71420915 is 51902417.

It is not a de Polignac number, because 71420915 - 2¹² = 71416819 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26270 + ... + 28860.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^71420915 is an apocalyptic number.

71420915 is a deficient number, since it is larger than the sum of its proper divisors (17225485).

71420915 is a wasteful number, since it uses less digits than its factorization.

71420915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 71420915 is about 8451.0895747235. The cubic root of 71420915 is about 414.8984413024.

The spelling of 71420915 in words is "seventy-one million, four hundred twenty thousand, nine hundred fifteen".