1240129 has 12 divisors (see below), whose sum is σ = 1405012. Its totient is φ = 1092960.

The previous prime is 1240117. The next prime is 1240139. The reversal of 1240129 is 9210421.

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 559504 = 825^2 + 748^2 .

It is not a de Polignac number, because 1240129 - 2⁵ = 1240097 is a prime.

It is an Ulam number.

It is a Duffinian number.

1240129 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1240139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4339 + ... + 4615.

2^1240129 is an apocalyptic number.

It is an amenable number.

1240129 is a deficient number, since it is larger than the sum of its proper divisors (164883).

1240129 is a wasteful number, since it uses less digits than its factorization.

1240129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1240129 is about 1113.6107937695. The cubic root of 1240129 is about 107.4374324934.

It can be divided in two parts, 1240 and 129, that added together give a square (1369 = 37²).

The spelling of 1240129 in words is "one million, two hundred forty thousand, one hundred twenty-nine".