1312404154 has 4 divisors (see below), whose sum is σ = 1968606234. Its totient is φ = 656202076.

The previous prime is 1312404151. The next prime is 1312404187. The reversal of 1312404154 is 4514042131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4514042131 = 1499 ⋅3011369.

It can be written as a sum of positive squares in only one way, i.e., 940955625 + 371448529 = 30675^2 + 19273^2 .

It is not an unprimeable number, because it can be changed into a prime (1312404151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328101037 + ... + 328101040.

Almost surely, 2^1312404154 is an apocalyptic number.

1312404154 is a deficient number, since it is larger than the sum of its proper divisors (656202080).

1312404154 is an equidigital number, since it uses as much as digits as its factorization.

1312404154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656202079.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1312404154 is about 36227.1190408512. The cubic root of 1312404154 is about 1094.8531329333.

Adding to 1312404154 its reverse (4514042131), we get a palindrome (5826446285).

The spelling of 1312404154 in words is "one billion, three hundred twelve million, four hundred four thousand, one hundred fifty-four".