1409869 has 2 divisors, whose sum is σ = 1409870. Its totient is φ = 1409868.

The previous prime is 1409851. The next prime is 1409879. The reversal of 1409869 is 9689041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 900 = 1187^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 1409869 - 2⁷ = 1409741 is a prime.

It is a super-2 number, since 2×1409869² = 3975461194322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1409879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704934 + 704935.

It is an arithmetic number, because the mean of its divisors is an integer number (704935).

2^1409869 is an apocalyptic number.

It is an amenable number.

1409869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409869 is an equidigital number, since it uses as much as digits as its factorization.

1409869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1409869 is about 1187.3790464717. The cubic root of 1409869 is about 112.1311442109.

It can be divided in two parts, 1409 and 869, that added together give a triangular number (2278 = T₆₇).

The spelling of 1409869 in words is "one million, four hundred nine thousand, eight hundred sixty-nine".