1253139 has 8 divisors (see below), whose sum is σ = 1683600. Its totient is φ = 829056.

The previous prime is 1253137. The next prime is 1253167. The reversal of 1253139 is 9313521.

It is a happy number.

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

It is not a de Polignac number, because 1253139 - 2¹ = 1253137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114 + ... + 1935.

It is an arithmetic number, because the mean of its divisors is an integer number (210450).

2^1253139 is an apocalyptic number.

1253139 is a deficient number, since it is larger than the sum of its proper divisors (430461).

1253139 is a wasteful number, since it uses less digits than its factorization.

1253139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189.

The product of its digits is 810, while the sum is 24.

The square root of 1253139 is about 1119.4369120232. The cubic root of 1253139 is about 107.8118294014.

The spelling of 1253139 in words is "one million, two hundred fifty-three thousand, one hundred thirty-nine".