19121055 has 8 divisors (see below), whose sum is σ = 30593712. Its totient is φ = 10197888.

The previous prime is 19121051. The next prime is 19121071. The reversal of 19121055 is 55012191.

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

It is not a de Polignac number, because 19121055 - 2² = 19121051 is a prime.

It is a super-2 number, since 2×19121055² = 731229488626050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19121051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637354 + ... + 637383.

It is an arithmetic number, because the mean of its divisors is an integer number (3824214).

Almost surely, 2^19121055 is an apocalyptic number.

19121055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19121055 is a deficient number, since it is larger than the sum of its proper divisors (11472657).

19121055 is a wasteful number, since it uses less digits than its factorization.

19121055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274745.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 19121055 is about 4372.7628565931. The cubic root of 19121055 is about 267.4056732084.

The spelling of 19121055 in words is "nineteen million, one hundred twenty-one thousand, fifty-five".