261622067 has 16 divisors (see below), whose sum is σ = 301777920. Its totient is φ = 222173952.

The previous prime is 261622063. The next prime is 261622093. The reversal of 261622067 is 760226162.

It is not a de Polignac number, because 261622067 - 2² = 261622063 is a prime.

It is a super-2 number, since 2×261622067² = 136892211882704978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261622063) by changing a digit.

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, 590348 + ... + 590790.

It is an arithmetic number, because the mean of its divisors is an integer number (18861120).

Almost surely, 2^261622067 is an apocalyptic number.

261622067 is a deficient number, since it is larger than the sum of its proper divisors (40155853).

261622067 is a wasteful number, since it uses less digits than its factorization.

261622067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 261622067 is about 16174.7354537872. The cubic root of 261622067 is about 639.5749676302.

The spelling of 261622067 in words is "two hundred sixty-one million, six hundred twenty-two thousand, sixty-seven".