190121274 has 72 divisors (see below), whose sum is σ = 495773460. Its totient is φ = 52440192.

The previous prime is 190121263. The next prime is 190121279. The reversal of 190121274 is 472121091.

It can be written as a sum of positive squares in 2 ways, for example, as 177822225 + 12299049 = 13335^2 + 3507^2 .

It is a super-2 number, since 2×190121274² = 72292197654766152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190121279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21862 + ... + 29294.

Almost surely, 2^190121274 is an apocalyptic number.

190121274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190121274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247886730).

190121274 is an abundant number, since it is smaller than the sum of its proper divisors (305652186).

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

190121274 is a wasteful number, since it uses less digits than its factorization.

190121274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7484 (or 7474 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 190121274 is about 13788.4471206877. The cubic root of 190121274 is about 575.0119962211.

The spelling of 190121274 in words is "one hundred ninety million, one hundred twenty-one thousand, two hundred seventy-four".