1381403 has 8 divisors (see below), whose sum is σ = 1526688. Its totient is φ = 1243264.

The previous prime is 1381397. The next prime is 1381409. The reversal of 1381403 is 3041831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1381397) and next prime (1381409).

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 1381403 - 2⁸ = 1381147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381409) 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, 1376 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (190836).

2^1381403 is an apocalyptic number.

1381403 is a deficient number, since it is larger than the sum of its proper divisors (145285).

1381403 is a wasteful number, since it uses less digits than its factorization.

1381403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573.

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

The square root of 1381403 is about 1175.3310172032. The cubic root of 1381403 is about 111.3713451027.

The spelling of 1381403 in words is "one million, three hundred eighty-one thousand, four hundred three".