1305672 has 16 divisors (see below), whose sum is σ = 3264240. Its totient is φ = 435216.

The previous prime is 1305659. The next prime is 1305679. The reversal of 1305672 is 2765031.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 54403 = 1305672 / (1 + 3 + 0 + 5 + 6 + 7 + 2).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1305679) 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, 27178 + ... + 27225.

It is an arithmetic number, because the mean of its divisors is an integer number (204015).

2^1305672 is an apocalyptic number.

1305672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305672 is an abundant number, since it is smaller than the sum of its proper divisors (1958568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1305672 is a wasteful number, since it uses less digits than its factorization.

1305672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54412 (or 54408 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1305672 is about 1142.6600544344. The cubic root of 1305672 is about 109.2977857204.

The spelling of 1305672 in words is "one million, three hundred five thousand, six hundred seventy-two".