1002254865 has 32 divisors (see below), whose sum is σ = 1617960960. Its totient is φ = 529776576.

The previous prime is 1002254863. The next prime is 1002254987. The reversal of 1002254865 is 5684522001.

It is not a de Polignac number, because 1002254865 - 2¹ = 1002254863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002254863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942324 + ... + 943386.

It is an arithmetic number, because the mean of its divisors is an integer number (50561280).

Almost surely, 2^1002254865 is an apocalyptic number.

1002254865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1002254865 is a deficient number, since it is larger than the sum of its proper divisors (615706095).

1002254865 is a wasteful number, since it uses less digits than its factorization.

1002254865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 1002254865 is about 31658.4090724724. The cubic root of 1002254865 is about 1000.7510574382.

Adding to 1002254865 its reverse (5684522001), we get a palindrome (6686776866).

The spelling of 1002254865 in words is "one billion, two million, two hundred fifty-four thousand, eight hundred sixty-five".