1540126081 has 8 divisors (see below), whose sum is σ = 1659115304. Its totient is φ = 1421210880.

The previous prime is 1540126051. The next prime is 1540126087. The reversal of 1540126081 is 1806210451.

It can be written as a sum of positive squares in 4 ways, for example, as 12567025 + 1527559056 = 3545^2 + 39084^2 .

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 1540126081 - 2²⁷ = 1405908353 is a prime.

It is a super-2 number, since 2×1540126081² = 4743976690752837122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540126087) 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, 29305 + ... + 62761.

It is an arithmetic number, because the mean of its divisors is an integer number (207389413).

Almost surely, 2^1540126081 is an apocalyptic number.

It is an amenable number.

1540126081 is a deficient number, since it is larger than the sum of its proper divisors (118989223).

1540126081 is a wasteful number, since it uses less digits than its factorization.

1540126081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37011.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1540126081 is about 39244.4401285074. The cubic root of 1540126081 is about 1154.8318642330.

The spelling of 1540126081 in words is "one billion, five hundred forty million, one hundred twenty-six thousand, eighty-one".