1021554042 has 16 divisors (see below), whose sum is σ = 2048679552. Its totient is φ = 339589440.

The previous prime is 1021554041. The next prime is 1021554047. The reversal of 1021554042 is 2404551201.

It is not an unprimeable number, because it can be changed into a prime (1021554041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229759 + ... + 234162.

It is an arithmetic number, because the mean of its divisors is an integer number (128042472).

Almost surely, 2^1021554042 is an apocalyptic number.

1021554042 is an abundant number, since it is smaller than the sum of its proper divisors (1027125510).

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

1021554042 is a wasteful number, since it uses less digits than its factorization.

1021554042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464293.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1021554042 is about 31961.7590567228. The cubic root of 1021554042 is about 1007.1336704042.

The spelling of 1021554042 in words is "one billion, twenty-one million, five hundred fifty-four thousand, forty-two".