1021345465 has 48 divisors (see below), whose sum is σ = 1546658064. Its totient is φ = 642969600.

The previous prime is 1021345453. The next prime is 1021345471. The reversal of 1021345465 is 5645431201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 248283049 + 773062416 = 15757^2 + 27804^2 .

It is not a de Polignac number, because 1021345465 - 2⁵ = 1021345433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167775 + ... + 173755.

It is an arithmetic number, because the mean of its divisors is an integer number (32222043).

Almost surely, 2^1021345465 is an apocalyptic number.

It is an amenable number.

1021345465 is a deficient number, since it is larger than the sum of its proper divisors (525312599).

1021345465 is a wasteful number, since it uses less digits than its factorization.

1021345465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6058 (or 6051 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1021345465 is about 31958.4959752489. The cubic root of 1021345465 is about 1007.0651215041.

Adding to 1021345465 its reverse (5645431201), we get a palindrome (6666776666).

The spelling of 1021345465 in words is "one billion, twenty-one million, three hundred forty-five thousand, four hundred sixty-five".