621340265 has 16 divisors (see below), whose sum is σ = 917672448. Its totient is φ = 393287616.

The previous prime is 621340249. The next prime is 621340273. The reversal of 621340265 is 562043126.

It is a cyclic number.

It is not a de Polignac number, because 621340265 - 2⁴ = 621340249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682337 + ... + 683246.

It is an arithmetic number, because the mean of its divisors is an integer number (57354528).

Almost surely, 2^621340265 is an apocalyptic number.

621340265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

621340265 is a deficient number, since it is larger than the sum of its proper divisors (296332183).

621340265 is a wasteful number, since it uses less digits than its factorization.

621340265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365608.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 621340265 is about 24926.6978358546. The cubic root of 621340265 is about 853.3158897225.

The spelling of 621340265 in words is "six hundred twenty-one million, three hundred forty thousand, two hundred sixty-five".