261252007 has 2 divisors, whose sum is σ = 261252008. Its totient is φ = 261252006.

The previous prime is 261251989. The next prime is 261252031. The reversal of 261252007 is 700252162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261252007 - 2²³ = 252863399 is a prime.

It is a super-2 number, since 2×261252007² = 136505222323056098, which contains 22 as substring.

It is equal to p_14260525 and since 261252007 and 14260525 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261252037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130626003 + 130626004.

It is an arithmetic number, because the mean of its divisors is an integer number (130626004).

Almost surely, 2^261252007 is an apocalyptic number.

261252007 is a deficient number, since it is larger than the sum of its proper divisors (1).

261252007 is an equidigital number, since it uses as much as digits as its factorization.

261252007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 261252007 is about 16163.2919604887. The cubic root of 261252007 is about 639.2732693359.

The spelling of 261252007 in words is "two hundred sixty-one million, two hundred fifty-two thousand, seven".