64231261 has 4 divisors (see below), whose sum is σ = 64460124. Its totient is φ = 64002400.

The previous prime is 64231243. The next prime is 64231309. The reversal of 64231261 is 16213246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34047225 + 30184036 = 5835^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 64231261 - 2¹⁷ = 64100189 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 (64231241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114010 + ... + 114571.

It is an arithmetic number, because the mean of its divisors is an integer number (16115031).

Almost surely, 2^64231261 is an apocalyptic number.

It is an amenable number.

64231261 is a deficient number, since it is larger than the sum of its proper divisors (228863).

64231261 is a wasteful number, since it uses less digits than its factorization.

64231261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228862.

The product of its digits is 1728, while the sum is 25.

The square root of 64231261 is about 8014.4407789939. The cubic root of 64231261 is about 400.4812145991.

The spelling of 64231261 in words is "sixty-four million, two hundred thirty-one thousand, two hundred sixty-one".