191421492 has 48 divisors (see below), whose sum is σ = 453264000. Its totient is φ = 62870400.

The previous prime is 191421463. The next prime is 191421493. The reversal of 191421492 is 294124191.

191421492 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191421493) 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, 269634 + ... + 270342.

It is an arithmetic number, because the mean of its divisors is an integer number (9443000).

Almost surely, 2^191421492 is an apocalyptic number.

191421492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191421492 is an abundant number, since it is smaller than the sum of its proper divisors (261842508).

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

191421492 is a wasteful number, since it uses less digits than its factorization.

191421492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1014 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 191421492 is about 13835.5156029690. The cubic root of 191421492 is about 576.3198334662.

The spelling of 191421492 in words is "one hundred ninety-one million, four hundred twenty-one thousand, four hundred ninety-two".