264406021 has 8 divisors (see below), whose sum is σ = 298389600. Its totient is φ = 232080240.

The previous prime is 264406003. The next prime is 264406031. The reversal of 264406021 is 120604462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264406021 - 2⁵ = 264405989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264406031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414111 + ... + 414748.

It is an arithmetic number, because the mean of its divisors is an integer number (37298700).

Almost surely, 2^264406021 is an apocalyptic number.

It is an amenable number.

264406021 is a deficient number, since it is larger than the sum of its proper divisors (33983579).

264406021 is a wasteful number, since it uses less digits than its factorization.

264406021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828899.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 264406021 is about 16260.5664415481. The cubic root of 264406021 is about 641.8355678236.

The spelling of 264406021 in words is "two hundred sixty-four million, four hundred six thousand, twenty-one".