19142661 has 8 divisors (see below), whose sum is σ = 25552800. Its totient is φ = 12747152.

The previous prime is 19142603. The next prime is 19142701. The reversal of 19142661 is 16624191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19142661 - 2⁶ = 19142597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19142261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 6188.

It is an arithmetic number, because the mean of its divisors is an integer number (3194100).

Almost surely, 2^19142661 is an apocalyptic number.

It is an amenable number.

19142661 is a deficient number, since it is larger than the sum of its proper divisors (6410139).

19142661 is a wasteful number, since it uses less digits than its factorization.

19142661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7315.

The product of its digits is 2592, while the sum is 30.

The square root of 19142661 is about 4375.2326795269. The cubic root of 19142661 is about 267.5063544069.

The spelling of 19142661 in words is "nineteen million, one hundred forty-two thousand, six hundred sixty-one".