427001261 has 2 divisors, whose sum is σ = 427001262. Its totient is φ = 427001260.

The previous prime is 427001167. The next prime is 427001293. The reversal of 427001261 is 162100724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239475625 + 187525636 = 15475^2 + 13694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427001261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427007261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213500630 + 213500631.

It is an arithmetic number, because the mean of its divisors is an integer number (213500631).

Almost surely, 2^427001261 is an apocalyptic number.

It is an amenable number.

427001261 is a deficient number, since it is larger than the sum of its proper divisors (1).

427001261 is an equidigital number, since it uses as much as digits as its factorization.

427001261 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 23.

The square root of 427001261 is about 20664.0088317829. The cubic root of 427001261 is about 753.0255625124.

Adding to 427001261 its reverse (162100724), we get a palindrome (589101985).

The spelling of 427001261 in words is "four hundred twenty-seven million, one thousand, two hundred sixty-one".