71421330 has 32 divisors (see below), whose sum is σ = 173974464. Its totient is φ = 18760896.

The previous prime is 71421319. The next prime is 71421367. The reversal of 71421330 is 3312417.

It is a junction number, because it is equal to n+sod(n) for n = 71421297 and 71421306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15757 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (5436702).

Almost surely, 2^71421330 is an apocalyptic number.

71421330 is an abundant number, since it is smaller than the sum of its proper divisors (102553134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71421330 is a wasteful number, since it uses less digits than its factorization.

71421330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35610.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71421330 is about 8451.1141277349. The cubic root of 71421330 is about 414.8992449069.

Adding to 71421330 its reverse (3312417), we get a palindrome (74733747).

The spelling of 71421330 in words is "seventy-one million, four hundred twenty-one thousand, three hundred thirty".