1390635 has 16 divisors (see below), whose sum is σ = 2472480. Its totient is φ = 741600.

The previous prime is 1390633. The next prime is 1390639. The reversal of 1390635 is 5360931.

It is not a de Polignac number, because 1390635 - 2¹ = 1390633 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1390599 and 1390608.

It is not an unprimeable number, because it can be changed into a prime (1390633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5016 + ... + 5285.

It is an arithmetic number, because the mean of its divisors is an integer number (154530).

2^1390635 is an apocalyptic number.

1390635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1390635 is a deficient number, since it is larger than the sum of its proper divisors (1081845).

1390635 is a wasteful number, since it uses less digits than its factorization.

1390635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10315 (or 10309 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 1390635 is about 1179.2518814910. The cubic root of 1390635 is about 111.6188949392.

It can be divided in two parts, 1390 and 635, that added together give a square (2025 = 45²).

The spelling of 1390635 in words is "one million, three hundred ninety thousand, six hundred thirty-five".