1259921 has 8 divisors (see below), whose sum is σ = 1436904. Its totient is φ = 1094400.

The previous prime is 1259903. The next prime is 1259927. The reversal of 1259921 is 1299521.

It can be written as a sum of positive squares in 4 ways, for example, as 330625 + 929296 = 575^2 + 964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1259921 - 2¹⁴ = 1243537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1259927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2630 + ... + 3071.

It is an arithmetic number, because the mean of its divisors is an integer number (179613).

2^1259921 is an apocalyptic number.

It is an amenable number.

1259921 is a deficient number, since it is larger than the sum of its proper divisors (176983).

1259921 is a wasteful number, since it uses less digits than its factorization.

1259921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 1620, while the sum is 29.

The square root of 1259921 is about 1122.4620260837. The cubic root of 1259921 is about 108.0059724635.

The spelling of 1259921 in words is "one million, two hundred fifty-nine thousand, nine hundred twenty-one".