1401409 has 2 divisors, whose sum is σ = 1401410. Its totient is φ = 1401408.

The previous prime is 1401403. The next prime is 1401437. The reversal of 1401409 is 9041041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 540225 = 928^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401409 - 2³ = 1401401 is a prime.

It is equal to p₁₀₇₂₁₈ and since 1401409 and 107218 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1401401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700704 + 700705.

It is an arithmetic number, because the mean of its divisors is an integer number (700705).

2^1401409 is an apocalyptic number.

It is an amenable number.

1401409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401409 is an equidigital number, since it uses as much as digits as its factorization.

1401409 is an evil number, because the sum of its binary digits is even.

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

The square root of 1401409 is about 1183.8112180580. The cubic root of 1401409 is about 111.9064109754.

The spelling of 1401409 in words is "one million, four hundred one thousand, four hundred nine".