1409138 has 4 divisors (see below), whose sum is σ = 2113710. Its totient is φ = 704568.

The previous prime is 1409117. The next prime is 1409159. The reversal of 1409138 is 8319041.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1409117) and next prime (1409159).

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 169 = 1187^2 + 13^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352283 + ... + 352286.

2^1409138 is an apocalyptic number.

1409138 is a deficient number, since it is larger than the sum of its proper divisors (704572).

1409138 is an equidigital number, since it uses as much as digits as its factorization.

1409138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704571.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1409138 is about 1187.0711857340. The cubic root of 1409138 is about 112.1117613139. Note that the first 3 decimals are identical.

Subtracting 1409138 from its reverse (8319041), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1409138 in words is "one million, four hundred nine thousand, one hundred thirty-eight".