1021042043 has 8 divisors (see below), whose sum is σ = 1177811712. Its totient is φ = 866999016.

The previous prime is 1021042037. The next prime is 1021042067. The reversal of 1021042043 is 3402401201.

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 1021042043 - 2²² = 1016847739 is a prime.

It is a super-2 number, since 2×1021042043² = 2085053707147227698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021042003) 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, 680855 + ... + 682352.

It is an arithmetic number, because the mean of its divisors is an integer number (147226464).

Almost surely, 2^1021042043 is an apocalyptic number.

1021042043 is a deficient number, since it is larger than the sum of its proper divisors (156769669).

1021042043 is a wasteful number, since it uses less digits than its factorization.

1021042043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363321.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1021042043 is about 31953.7484968509. The cubic root of 1021042043 is about 1006.9653850982.

Adding to 1021042043 its reverse (3402401201), we get a palindrome (4423443244).

The spelling of 1021042043 in words is "one billion, twenty-one million, forty-two thousand, forty-three".