1381455 has 28 divisors (see below), whose sum is σ = 2492040. Its totient is φ = 734832.

The previous prime is 1381451. The next prime is 1381459. The reversal of 1381455 is 5541831.

It is an interprime number because it is at equal distance from previous prime (1381451) and next prime (1381459).

It is not a de Polignac number, because 1381455 - 2² = 1381451 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

1381455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381451) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3456 + ... + 3834.

2^1381455 is an apocalyptic number.

1381455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1381455 is a deficient number, since it is larger than the sum of its proper divisors (1110585).

1381455 is an frugal number, since it uses more digits than its factorization.

1381455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 387 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1381455 is about 1175.3531384227. The cubic root of 1381455 is about 111.3727425315.

The spelling of 1381455 in words is "one million, three hundred eighty-one thousand, four hundred fifty-five".