1390455 has 36 divisors (see below), whose sum is σ = 2679768. Its totient is φ = 661440.

The previous prime is 1390421. The next prime is 1390457. The reversal of 1390455 is 5540931.

It is not a de Polignac number, because 1390455 - 2⁶ = 1390391 is a prime.

1390455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26209 + ... + 26261.

It is an arithmetic number, because the mean of its divisors is an integer number (74438).

2^1390455 is an apocalyptic number.

1390455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1390455 is a deficient number, since it is larger than the sum of its proper divisors (1289313).

1390455 is a wasteful number, since it uses less digits than its factorization.

1390455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1390455 is about 1179.1755594482. The cubic root of 1390455 is about 111.6140788497.

The spelling of 1390455 in words is "one million, three hundred ninety thousand, four hundred fifty-five".