42700261 has 2 divisors, whose sum is σ = 42700262. Its totient is φ = 42700260.

The previous prime is 42700249. The next prime is 42700283. The reversal of 42700261 is 16200724.

It is an a-pointer prime, because the next prime (42700283) can be obtained adding 42700261 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 5612161 = 6090^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 42700261 - 2¹¹ = 42698213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42700241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21350130 + 21350131.

It is an arithmetic number, because the mean of its divisors is an integer number (21350131).

Almost surely, 2^42700261 is an apocalyptic number.

It is an amenable number.

42700261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42700261 is an equidigital number, since it uses as much as digits as its factorization.

42700261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 42700261 is about 6534.5436719024. The cubic root of 42700261 is about 349.5238723142.

Adding to 42700261 its reverse (16200724), we get a palindrome (58900985).

The spelling of 42700261 in words is "forty-two million, seven hundred thousand, two hundred sixty-one".