71421790 has 32 divisors (see below), whose sum is σ = 140621184. Its totient is φ = 25902240.

The previous prime is 71421787. The next prime is 71421797. The reversal of 71421790 is 9712417.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71421797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59577 + ... + 60763.

It is an arithmetic number, because the mean of its divisors is an integer number (4394412).

Almost surely, 2^71421790 is an apocalyptic number.

71421790 is a deficient number, since it is larger than the sum of its proper divisors (69199394).

71421790 is a wasteful number, since it uses less digits than its factorization.

71421790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 71421790 is about 8451.1413430376. The cubic root of 71421790 is about 414.9001356457.

The spelling of 71421790 in words is "seventy-one million, four hundred twenty-one thousand, seven hundred ninety".