1540261001 has 2 divisors, whose sum is σ = 1540261002. Its totient is φ = 1540261000.

The previous prime is 1540260983. The next prime is 1540261103. The reversal of 1540261001 is 1001620451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1312975225 + 227285776 = 36235^2 + 15076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540261001 - 2⁶ = 1540260937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540261301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770130500 + 770130501.

It is an arithmetic number, because the mean of its divisors is an integer number (770130501).

Almost surely, 2^1540261001 is an apocalyptic number.

It is an amenable number.

1540261001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540261001 is an equidigital number, since it uses as much as digits as its factorization.

1540261001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1540261001 is about 39246.1590604737. The cubic root of 1540261001 is about 1154.8655855773.

Adding to 1540261001 its reverse (1001620451), we get a palindrome (2541881452).

The spelling of 1540261001 in words is "one billion, five hundred forty million, two hundred sixty-one thousand, one".