1264658 has 4 divisors (see below), whose sum is σ = 1896990. Its totient is φ = 632328.

The previous prime is 1264657. The next prime is 1264663. The reversal of 1264658 is 8564621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8564621 = 13 ⋅658817.

It can be written as a sum of positive squares in only one way, i.e., 1129969 + 134689 = 1063^2 + 367^2 .

It is not an unprimeable number, because it can be changed into a prime (1264651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316163 + ... + 316166.

2^1264658 is an apocalyptic number.

1264658 is a deficient number, since it is larger than the sum of its proper divisors (632332).

1264658 is an equidigital number, since it uses as much as digits as its factorization.

1264658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632331.

The product of its digits is 11520, while the sum is 32.

The square root of 1264658 is about 1124.5701400980. The cubic root of 1264658 is about 108.1411620065.

The spelling of 1264658 in words is "one million, two hundred sixty-four thousand, six hundred fifty-eight".