21265002 has 48 divisors (see below), whose sum is σ = 50600160. Its totient is φ = 6400800.

The previous prime is 21265001. The next prime is 21265043. The reversal of 21265002 is 20056212.

21265002 is a `hidden beast` number, since 2 + 12 + 650 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21265001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41524 + ... + 42032.

It is an arithmetic number, because the mean of its divisors is an integer number (1054170).

Almost surely, 2^21265002 is an apocalyptic number.

21265002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21265002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25300080).

21265002 is an abundant number, since it is smaller than the sum of its proper divisors (29335158).

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

21265002 is a wasteful number, since it uses less digits than its factorization.

21265002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21265002 is about 4611.3991369215. The cubic root of 21265002 is about 277.0480786447.

The spelling of 21265002 in words is "twenty-one million, two hundred sixty-five thousand, two".