261314507 has 2 divisors, whose sum is σ = 261314508. Its totient is φ = 261314506.

The previous prime is 261314503. The next prime is 261314519. The reversal of 261314507 is 705413162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261314507 - 2² = 261314503 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261314507.

It is not a weakly prime, because it can be changed into another prime (261314503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130657253 + 130657254.

It is an arithmetic number, because the mean of its divisors is an integer number (130657254).

Almost surely, 2^261314507 is an apocalyptic number.

261314507 is a deficient number, since it is larger than the sum of its proper divisors (1).

261314507 is an equidigital number, since it uses as much as digits as its factorization.

261314507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 261314507 is about 16165.2252381462. The cubic root of 261314507 is about 639.3242436091.

Adding to 261314507 its reverse (705413162), we get a palindrome (966727669).

The spelling of 261314507 in words is "two hundred sixty-one million, three hundred fourteen thousand, five hundred seven".