191454642 has 24 divisors (see below), whose sum is σ = 415091820. Its totient is φ = 63776160.

The previous prime is 191454631. The next prime is 191454671. The reversal of 191454642 is 246454191.

191454642 is a `hidden beast` number, since 1 + 9 + 1 + 4 + 5 + 4 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 186076881 + 5377761 = 13641^2 + 2319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 191454597 and 191454606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37584 + ... + 42372.

Almost surely, 2^191454642 is an apocalyptic number.

191454642 is an abundant number, since it is smaller than the sum of its proper divisors (223637178).

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

191454642 is a wasteful number, since it uses less digits than its factorization.

191454642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018 (or 7015 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 191454642 is about 13836.7135548872. The cubic root of 191454642 is about 576.3531001935.

The spelling of 191454642 in words is "one hundred ninety-one million, four hundred fifty-four thousand, six hundred forty-two".