1402409 has 8 divisors (see below), whose sum is σ = 1524480. Its totient is φ = 1285200.

The previous prime is 1402399. The next prime is 1402417. The reversal of 1402409 is 9042041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1402409 - 2⁸ = 1402153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (190560).

2^1402409 is an apocalyptic number.

1402409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1402409 is a deficient number, since it is larger than the sum of its proper divisors (122071).

1402409 is a wasteful number, since it uses less digits than its factorization.

1402409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1402409 is about 1184.2335073794. The cubic root of 1402409 is about 111.9330222416.

The spelling of 1402409 in words is "one million, four hundred two thousand, four hundred nine".