1391229 has 32 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 746496.

The previous prime is 1391207. The next prime is 1391233. The reversal of 1391229 is 9221931.

It is not a de Polignac number, because 1391229 - 2¹³ = 1383037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1391229 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2997 + ... + 3429.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2^1391229 is an apocalyptic number.

It is an amenable number.

1391229 is a deficient number, since it is larger than the sum of its proper divisors (1108611).

1391229 is a wasteful number, since it uses less digits than its factorization.

1391229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 460 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1391229 is about 1179.5037091930. The cubic root of 1391229 is about 111.6347850867.

The spelling of 1391229 in words is "one million, three hundred ninety-one thousand, two hundred twenty-nine".