1021431043 has 8 divisors (see below), whose sum is σ = 1091439360. Its totient is φ = 952525440.

The previous prime is 1021431041. The next prime is 1021431107. The reversal of 1021431043 is 3401341201.

1021431043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021431043 - 2¹ = 1021431041 is a prime.

It is a super-3 number, since 3×1021431043³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021431043.

It is not an unprimeable number, because it can be changed into a prime (1021431041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273763 + ... + 277468.

It is an arithmetic number, because the mean of its divisors is an integer number (136429920).

Almost surely, 2^1021431043 is an apocalyptic number.

1021431043 is a deficient number, since it is larger than the sum of its proper divisors (70008317).

1021431043 is a wasteful number, since it uses less digits than its factorization.

1021431043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551357.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1021431043 is about 31959.8348399988. The cubic root of 1021431043 is about 1007.0932478710.

Adding to 1021431043 its reverse (3401341201), we get a palindrome (4422772244).

The spelling of 1021431043 in words is "one billion, twenty-one million, four hundred thirty-one thousand, forty-three".