1167040021 has 16 divisors (see below), whose sum is σ = 1486546560. Its totient is φ = 891924480.

The previous prime is 1167040003. The next prime is 1167040027. The reversal of 1167040021 is 1200407611.

It is a cyclic number.

It is not a de Polignac number, because 1167040021 - 2⁷ = 1167039893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1167039974 and 1167040001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1167040027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255820 + ... + 260341.

It is an arithmetic number, because the mean of its divisors is an integer number (92909160).

Almost surely, 2^1167040021 is an apocalyptic number.

It is an amenable number.

1167040021 is a deficient number, since it is larger than the sum of its proper divisors (319506539).

1167040021 is a wasteful number, since it uses less digits than its factorization.

1167040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516204.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1167040021 is about 34161.9674638332. The cubic root of 1167040021 is about 1052.8388847861.

Adding to 1167040021 its reverse (1200407611), we get a palindrome (2367447632).

The spelling of 1167040021 in words is "one billion, one hundred sixty-seven million, forty thousand, twenty-one".