1296154540 has 24 divisors (see below), whose sum is σ = 2865184560. Its totient is φ = 491174208.

The previous prime is 1296154537. The next prime is 1296154543. The reversal of 1296154540 is 454516921.

It is an interprime number because it is at equal distance from previous prime (1296154537) and next prime (1296154543).

It is a super-2 number, since 2×1296154540² = 3360033183125223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1296154540.

It is not an unprimeable number, because it can be changed into a prime (1296154543) 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 in 7 ways as a sum of consecutive naturals, for example, 1705087 + ... + 1705846.

It is an arithmetic number, because the mean of its divisors is an integer number (119382690).

Almost surely, 2^1296154540 is an apocalyptic number.

1296154540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296154540 is an abundant number, since it is smaller than the sum of its proper divisors (1569030020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296154540 is a wasteful number, since it uses less digits than its factorization.

1296154540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410961 (or 3410959 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1296154540 is about 36002.1463249068. The cubic root of 1296154540 is about 1090.3156900597.

The spelling of 1296154540 in words is "one billion, two hundred ninety-six million, one hundred fifty-four thousand, five hundred forty".