1454190021 has 24 divisors (see below), whose sum is σ = 2178676344. Its totient is φ = 933897600.

The previous prime is 1454189999. The next prime is 1454190071. The reversal of 1454190021 is 1200914541.

1454190021 is a `hidden beast` number, since 1 + 454 + 190 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 471367521 + 982822500 = 21711^2 + 31350^2 .

It is not a de Polignac number, because 1454190021 - 2¹⁵ = 1454157253 is a prime.

It is a super-2 number, since 2×1454190021² = 4229337234351960882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1454190071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12015 + ... + 55251.

It is an arithmetic number, because the mean of its divisors is an integer number (90778181).

Almost surely, 2^1454190021 is an apocalyptic number.

It is an amenable number.

1454190021 is a deficient number, since it is larger than the sum of its proper divisors (724486323).

1454190021 is a wasteful number, since it uses less digits than its factorization.

1454190021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43381 (or 43378 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1454190021 is about 38133.8435120301. The cubic root of 1454190021 is about 1132.9403728669.

The spelling of 1454190021 in words is "one billion, four hundred fifty-four million, one hundred ninety thousand, twenty-one".