1427544021 has 16 divisors (see below), whose sum is σ = 1939072320. Its totient is φ = 933928320.

The previous prime is 1427544007. The next prime is 1427544037. The reversal of 1427544021 is 1204457241.

It is not a de Polignac number, because 1427544021 - 2⁵ = 1427543989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1427544021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427544091) 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 15 ways as a sum of consecutive naturals, for example, 72265 + ... + 89873.

It is an arithmetic number, because the mean of its divisors is an integer number (121192020).

Almost surely, 2^1427544021 is an apocalyptic number.

It is an amenable number.

1427544021 is a deficient number, since it is larger than the sum of its proper divisors (511528299).

1427544021 is a wasteful number, since it uses less digits than its factorization.

1427544021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18116.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 1427544021 is about 37782.8535317279. The cubic root of 1427544021 is about 1125.9778220527.

The spelling of 1427544021 in words is "one billion, four hundred twenty-seven million, five hundred forty-four thousand, twenty-one".