1309870 has 8 divisors (see below), whose sum is σ = 2357784. Its totient is φ = 523944.

The previous prime is 1309849. The next prime is 1309877. The reversal of 1309870 is 789031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309877) 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, 65484 + ... + 65503.

It is an arithmetic number, because the mean of its divisors is an integer number (294723).

2^1309870 is an apocalyptic number.

1309870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309870 is a deficient number, since it is larger than the sum of its proper divisors (1047914).

1309870 is a wasteful number, since it uses less digits than its factorization.

1309870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130994.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1309870 is about 1144.4955220533. The cubic root of 1309870 is about 109.4147985779.

It can be divided in two parts, 130 and 9870, that added together give a 4-th power (10000 = 10⁴).

The spelling of 1309870 in words is "one million, three hundred nine thousand, eight hundred seventy".