1269139 has 4 divisors (see below), whose sum is σ = 1271440. Its totient is φ = 1266840.
The previous prime is 1269131. The next prime is 1269167. The reversal of 1269139 is 9319621.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9319621 = 17 ⋅548213.
It is a cyclic number.
It is not a de Polignac number, because 1269139 - 23 = 1269131 is a prime.
It is a super-2 number, since 2×12691392 = 3221427602642, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 1269139.
It is not an unprimeable number, because it can be changed into a prime (1269131) 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, 229 + ... + 1609.
It is an arithmetic number, because the mean of its divisors is an integer number (317860).
21269139 is an apocalyptic number.
1269139 is a deficient number, since it is larger than the sum of its proper divisors (2301).
1269139 is an equidigital number, since it uses as much as digits as its factorization.
1269139 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2300.
The product of its digits is 2916, while the sum is 31.
The square root of 1269139 is about 1126.5606952135. The cubic root of 1269139 is about 108.2687351899.
The spelling of 1269139 in words is "one million, two hundred sixty-nine thousand, one hundred thirty-nine".
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