1290165000 has 80 divisors (see below), whose sum is σ = 4030522320. Its totient is φ = 344040000.

The previous prime is 1290164983. The next prime is 1290165001. The reversal of 1290165000 is 5610921.

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

It is not an unprimeable number, because it can be changed into a prime (1290165001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28006 + ... + 58005.

It is an arithmetic number, because the mean of its divisors is an integer number (50381529).

Almost surely, 2^1290165000 is an apocalyptic number.

1290165000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290165000 is an abundant number, since it is smaller than the sum of its proper divisors (2740357320).

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

1290165000 is an equidigital number, since it uses as much as digits as its factorization.

1290165000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86040 (or 86021 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1290165000 is about 35918.8669086317. The cubic root of 1290165000 is about 1088.6336441082.

Adding to 1290165000 its reverse (5610921), we get a palindrome (1295775921).

The spelling of 1290165000 in words is "one billion, two hundred ninety million, one hundred sixty-five thousand".