1261239 has 32 divisors (see below), whose sum is σ = 2112000. Its totient is φ = 653184.

The previous prime is 1261223. The next prime is 1261259. The reversal of 1261239 is 9321621.

It is not a de Polignac number, because 1261239 - 2⁴ = 1261223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11517 + ... + 11625.

It is an arithmetic number, because the mean of its divisors is an integer number (66000).

2^1261239 is an apocalyptic number.

1261239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1261239 is a deficient number, since it is larger than the sum of its proper divisors (850761).

1261239 is a wasteful number, since it uses less digits than its factorization.

1261239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167.

The product of its digits is 648, while the sum is 24.

The square root of 1261239 is about 1123.0489748893. The cubic root of 1261239 is about 108.0436209252.

The spelling of 1261239 in words is "one million, two hundred sixty-one thousand, two hundred thirty-nine".