261622007 has 8 divisors (see below), whose sum is σ = 267662880. Its totient is φ = 255646720.

The previous prime is 261622003. The next prime is 261622057. The reversal of 261622007 is 700226162.

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 261622007 - 2² = 261622003 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 (261622003) 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, 8282 + ... + 24327.

It is an arithmetic number, because the mean of its divisors is an integer number (33457860).

Almost surely, 2^261622007 is an apocalyptic number.

261622007 is a deficient number, since it is larger than the sum of its proper divisors (6040873).

261622007 is a wasteful number, since it uses less digits than its factorization.

261622007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32793.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 261622007 is about 16174.7335990427. The cubic root of 261622007 is about 639.5749187371.

Adding to 261622007 its reverse (700226162), we get a palindrome (961848169).

The spelling of 261622007 in words is "two hundred sixty-one million, six hundred twenty-two thousand, seven".