1296002040 has 32 divisors (see below), whose sum is σ = 3888006480. Its totient is φ = 345600512.

The previous prime is 1296002033. The next prime is 1296002047. The reversal of 1296002040 is 402006921.

It is an interprime number because it is at equal distance from previous prime (1296002033) and next prime (1296002047).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1296002040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296002047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5399889 + ... + 5400128.

Almost surely, 2^1296002040 is an apocalyptic number.

1296002040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296002040 is an abundant number, since it is smaller than the sum of its proper divisors (2592004440).

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

1296002040 is a wasteful number, since it uses less digits than its factorization.

1296002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10800031 (or 10800027 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1296002040 is about 36000.0283333222. The cubic root of 1296002040 is about 1090.2729277555.

Adding to 1296002040 its reverse (402006921), we get a palindrome (1698008961).

The spelling of 1296002040 in words is "one billion, two hundred ninety-six million, two thousand, forty".