1021431044 has 24 divisors (see below), whose sum is σ = 1803480000. Its totient is φ = 506167200.

The previous prime is 1021431041. The next prime is 1021431107. The reversal of 1021431044 is 4401341201.

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, 299702 + ... + 303090.

It is an arithmetic number, because the mean of its divisors is an integer number (75145000).

Almost surely, 2^1021431044 is an apocalyptic number.

It is an amenable number.

1021431044 is a deficient number, since it is larger than the sum of its proper divisors (782048956).

1021431044 is a wasteful number, since it uses less digits than its factorization.

1021431044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043 (or 4041 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1021431044 is about 31959.8348556434. The cubic root of 1021431044 is about 1007.0932481997.

Adding to 1021431044 its reverse (4401341201), we get a palindrome (5422772245).

The spelling of 1021431044 in words is "one billion, twenty-one million, four hundred thirty-one thousand, forty-four".