1262139 has 8 divisors (see below), whose sum is σ = 1688400. Its totient is φ = 838656.

The previous prime is 1262119. The next prime is 1262143. The reversal of 1262139 is 9312621.

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

It is not a de Polignac number, because 1262139 - 2⁷ = 1262011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1262119) 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, 879 + ... + 1815.

It is an arithmetic number, because the mean of its divisors is an integer number (211050).

2^1262139 is an apocalyptic number.

1262139 is a deficient number, since it is larger than the sum of its proper divisors (426261).

1262139 is an equidigital number, since it uses as much as digits as its factorization.

1262139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389.

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

The square root of 1262139 is about 1123.4495983354. The cubic root of 1262139 is about 108.0693142153.

The spelling of 1262139 in words is "one million, two hundred sixty-two thousand, one hundred thirty-nine".