1229409 has 6 divisors (see below), whose sum is σ = 1775826. Its totient is φ = 819600.

The previous prime is 1229401. The next prime is 1229443. The reversal of 1229409 is 9049221.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 278784 = 975^2 + 528^2 .

It is not a de Polignac number, because 1229409 - 2³ = 1229401 is a prime.

It is a super-2 number, since 2×1229409² = 3022892978562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1229401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68292 + ... + 68309.

It is an arithmetic number, because the mean of its divisors is an integer number (295971).

2^1229409 is an apocalyptic number.

It is an amenable number.

1229409 is a deficient number, since it is larger than the sum of its proper divisors (546417).

1229409 is a wasteful number, since it uses less digits than its factorization.

1229409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136607 (or 136604 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1229409 is about 1108.7871752505. The cubic root of 1229409 is about 107.1269637378.

The spelling of 1229409 in words is "one million, two hundred twenty-nine thousand, four hundred nine".