1319540121 has 12 divisors (see below), whose sum is σ = 1906353072. Its totient is φ = 879531576.

The previous prime is 1319540111. The next prime is 1319540129. The reversal of 1319540121 is 1210459131.

It is a happy number.

It is not a de Polignac number, because 1319540121 - 2¹⁹ = 1319015833 is a prime.

It is a super-5 number, since 5×1319540121⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1319540129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58210 + ... + 77636.

It is an arithmetic number, because the mean of its divisors is an integer number (158862756).

Almost surely, 2^1319540121 is an apocalyptic number.

It is an amenable number.

1319540121 is a deficient number, since it is larger than the sum of its proper divisors (586812951).

1319540121 is a wasteful number, since it uses less digits than its factorization.

1319540121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26980 (or 26977 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1319540121 is about 36325.4748213977. The cubic root of 1319540121 is about 1096.8339044091.

Adding to 1319540121 its reverse (1210459131), we get a palindrome (2529999252).

The spelling of 1319540121 in words is "one billion, three hundred nineteen million, five hundred forty thousand, one hundred twenty-one".