1045665321252 has 48 divisors (see below), whose sum is σ = 2591863243200. Its totient is φ = 327180643200.

The previous prime is 1045665321241. The next prime is 1045665321257. The reversal of 1045665321252 is 2521235665401.

It is not an unprimeable number, because it can be changed into a prime (1045665321257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21012999 + ... + 21062702.

It is an arithmetic number, because the mean of its divisors is an integer number (53997150900).

Almost surely, 2^{1045665321252} is an apocalyptic number.

1045665321252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1045665321252 is an abundant number, since it is smaller than the sum of its proper divisors (1546197921948).

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

1045665321252 is a wasteful number, since it uses less digits than its factorization.

1045665321252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42075836 (or 42075834 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 1045665321252 in words is "one trillion, forty-five billion, six hundred sixty-five million, three hundred twenty-one thousand, two hundred fifty-two".