191421260 has 48 divisors (see below), whose sum is σ = 408899232. Its totient is φ = 75264000.

The previous prime is 191421259. The next prime is 191421283. The reversal of 191421260 is 62124191.

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, 389615 + ... + 390105.

It is an arithmetic number, because the mean of its divisors is an integer number (8518734).

Almost surely, 2^191421260 is an apocalyptic number.

191421260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191421260 is an abundant number, since it is smaller than the sum of its proper divisors (217477972).

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

191421260 is a wasteful number, since it uses less digits than its factorization.

191421260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 191421260 is about 13835.5072187470. The cubic root of 191421260 is about 576.3196006357.

It can be divided in two parts, 19142 and 1260, that added together give a palindrome (20402).

The spelling of 191421260 in words is "one hundred ninety-one million, four hundred twenty-one thousand, two hundred sixty".