1540021141 has 8 divisors (see below), whose sum is σ = 1582337024. Its totient is φ = 1497741840.

The previous prime is 1540021123. The next prime is 1540021151. The reversal of 1540021141 is 1411200451.

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 1540021141 - 2⁷ = 1540021013 is a prime.

It is a super-2 number, since 2×1540021141² = 4743330229453883762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540021151) 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 7 ways as a sum of consecutive naturals, for example, 91036 + ... + 106618.

It is an arithmetic number, because the mean of its divisors is an integer number (197792128).

Almost surely, 2^1540021141 is an apocalyptic number.

It is an amenable number.

1540021141 is a deficient number, since it is larger than the sum of its proper divisors (42315883).

1540021141 is a wasteful number, since it uses less digits than its factorization.

1540021141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18291.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1540021141 is about 39243.1031010546. The cubic root of 1540021141 is about 1154.8056346038.

Adding to 1540021141 its reverse (1411200451), we get a palindrome (2951221592).

The spelling of 1540021141 in words is "one billion, five hundred forty million, twenty-one thousand, one hundred forty-one".