1264861 has 8 divisors (see below), whose sum is σ = 1373400. Its totient is φ = 1157952.

The previous prime is 1264859. The next prime is 1264867. The reversal of 1264861 is 1684621.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 1232100 = 181^2 + 1110^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1264861 - 2¹ = 1264859 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611 + ... + 2263.

It is an arithmetic number, because the mean of its divisors is an integer number (171675).

2^1264861 is an apocalyptic number.

It is an amenable number.

1264861 is a deficient number, since it is larger than the sum of its proper divisors (108539).

1264861 is a wasteful number, since it uses less digits than its factorization.

1264861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its digits is 2304, while the sum is 28.

The square root of 1264861 is about 1124.6603931854. The cubic root of 1264861 is about 108.1469478873.

The spelling of 1264861 in words is "one million, two hundred sixty-four thousand, eight hundred sixty-one".