21254960 has 40 divisors (see below), whose sum is σ = 49617360. Its totient is φ = 8467712.

The previous prime is 21254957. The next prime is 21254963. The reversal of 21254960 is 6945212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21254957) and next prime (21254963).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (21254963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30779 + ... + 31461.

It is an arithmetic number, because the mean of its divisors is an integer number (1240434).

Almost surely, 2^21254960 is an apocalyptic number.

21254960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21254960 is an abundant number, since it is smaller than the sum of its proper divisors (28362400).

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

21254960 is a wasteful number, since it uses less digits than its factorization.

21254960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 21254960 is about 4610.3101847923. The cubic root of 21254960 is about 277.0044615181.

It can be divided in two parts, 2 and 1254960, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 21254960 in words is "twenty-one million, two hundred fifty-four thousand, nine hundred sixty".