1264645 has 16 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 950400.

The previous prime is 1264643. The next prime is 1264649. The reversal of 1264645 is 5464621.

1264645 = T₂₇₀ + T₂₇₁ + ... + T₃₀₀.

It is not a de Polignac number, because 1264645 - 2¹ = 1264643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6256 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1264645 is an apocalyptic number.

It is an amenable number.

1264645 is a deficient number, since it is larger than the sum of its proper divisors (348155).

1264645 is a wasteful number, since it uses less digits than its factorization.

1264645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its digits is 5760, while the sum is 28.

The square root of 1264645 is about 1124.5643600968. The cubic root of 1264645 is about 108.1407914610.

The spelling of 1264645 in words is "one million, two hundred sixty-four thousand, six hundred forty-five".