1540980121 has 16 divisors (see below), whose sum is σ = 1632109248. Its totient is φ = 1453132800.

The previous prime is 1540980071. The next prime is 1540980127. The reversal of 1540980121 is 1210890451.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1540980121 - 2²⁹ = 1004109209 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 166506 + ... + 175516.

It is an arithmetic number, because the mean of its divisors is an integer number (102006828).

Almost surely, 2^1540980121 is an apocalyptic number.

It is an amenable number.

1540980121 is a deficient number, since it is larger than the sum of its proper divisors (91129127).

1540980121 is an equidigital number, since it uses as much as digits as its factorization.

1540980121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9192.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1540980121 is about 39255.3196522459. The cubic root of 1540980121 is about 1155.0452862312.

The spelling of 1540980121 in words is "one billion, five hundred forty million, nine hundred eighty thousand, one hundred twenty-one".