1021142454 has 24 divisors (see below), whose sum is σ = 2134947192. Its totient is φ = 325580640.

The previous prime is 1021142453. The next prime is 1021142459. The reversal of 1021142454 is 4542411201.

It is a super-3 number, since 3×1021142454³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021142453) 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 11 ways as a sum of consecutive naturals, for example, 157687 + ... + 164034.

It is an arithmetic number, because the mean of its divisors is an integer number (88956133).

Almost surely, 2^1021142454 is an apocalyptic number.

1021142454 is an abundant number, since it is smaller than the sum of its proper divisors (1113804738).

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

1021142454 is a wasteful number, since it uses less digits than its factorization.

1021142454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321772 (or 321749 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1021142454 is about 31955.3196510378. The cubic root of 1021142454 is about 1006.9983929088.

Adding to 1021142454 its reverse (4542411201), we get a palindrome (5563553655).

The spelling of 1021142454 in words is "one billion, twenty-one million, one hundred forty-two thousand, four hundred fifty-four".