1264181 has 4 divisors (see below), whose sum is σ = 1266432. Its totient is φ = 1261932.

The previous prime is 1264177. The next prime is 1264189. The reversal of 1264181 is 1814621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1814621 = 89 ⋅20389.

It is a cyclic number.

It is not a de Polignac number, because 1264181 - 2² = 1264177 is a prime.

It is a super-2 number, since 2×1264181² = 3196307201522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264189) 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, 506 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (316608).

2^1264181 is an apocalyptic number.

It is an amenable number.

1264181 is a deficient number, since it is larger than the sum of its proper divisors (2251).

1264181 is a wasteful number, since it uses less digits than its factorization.

1264181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250.

The product of its digits is 384, while the sum is 23.

The square root of 1264181 is about 1124.3580390605. The cubic root of 1264181 is about 108.1275641745.

The spelling of 1264181 in words is "one million, two hundred sixty-four thousand, one hundred eighty-one".