1622601261 has 32 divisors (see below), whose sum is σ = 2548022400. Its totient is φ = 1016997120.

The previous prime is 1622601229. The next prime is 1622601271. The reversal of 1622601261 is 1621062261.

1622601261 is a `hidden beast` number, since 16 + 22 + 601 + 26 + 1 = 666.

It is not a de Polignac number, because 1622601261 - 2⁵ = 1622601229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622601271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701575 + ... + 703883.

It is an arithmetic number, because the mean of its divisors is an integer number (79625700).

Almost surely, 2^1622601261 is an apocalyptic number.

It is an amenable number.

1622601261 is a deficient number, since it is larger than the sum of its proper divisors (925421139).

1622601261 is a wasteful number, since it uses less digits than its factorization.

1622601261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866 (or 3860 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1622601261 is about 40281.5250580213. The cubic root of 1622601261 is about 1175.0885730122.

The spelling of 1622601261 in words is "one billion, six hundred twenty-two million, six hundred one thousand, two hundred sixty-one".