1540980123 has 24 divisors (see below), whose sum is σ = 2173986000. Its totient is φ = 970776576.

The previous prime is 1540980071. The next prime is 1540980127. The reversal of 1540980123 is 3210890451.

It is not a de Polignac number, because 1540980123 - 2¹² = 1540976027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1540980127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484683 + ... + 487851.

It is an arithmetic number, because the mean of its divisors is an integer number (90582750).

Almost surely, 2^1540980123 is an apocalyptic number.

1540980123 is a deficient number, since it is larger than the sum of its proper divisors (633005877).

1540980123 is a wasteful number, since it uses less digits than its factorization.

1540980123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1540980123 is about 39255.3196777201. The cubic root of 1540980123 is about 1155.0452867309.

The spelling of 1540980123 in words is "one billion, five hundred forty million, nine hundred eighty thousand, one hundred twenty-three".