1540797542 has 16 divisors (see below), whose sum is σ = 2322356400. Its totient is φ = 766686048.

The previous prime is 1540797473. The next prime is 1540797553. The reversal of 1540797542 is 2457970451.

It is a junction number, because it is equal to n+sod(n) for n = 1540797493 and 1540797502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789584 + ... + 791532.

It is an arithmetic number, because the mean of its divisors is an integer number (145147275).

Almost surely, 2^1540797542 is an apocalyptic number.

1540797542 is a deficient number, since it is larger than the sum of its proper divisors (781558858).

1540797542 is a wasteful number, since it uses less digits than its factorization.

1540797542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 1540797542 is about 39252.9940514096. The cubic root of 1540797542 is about 1154.9996669227. Note that the first 3 decimals are identical.

The spelling of 1540797542 in words is "one billion, five hundred forty million, seven hundred ninety-seven thousand, five hundred forty-two".