1390061 has 4 divisors (see below), whose sum is σ = 1422432. Its totient is φ = 1357692.

The previous prime is 1390043. The next prime is 1390069. The reversal of 1390061 is 1600931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1600931 = 283 ⋅5657.

It is a cyclic number.

It is not a de Polignac number, because 1390061 - 2¹⁴ = 1373677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16121 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (355608).

2^1390061 is an apocalyptic number.

It is an amenable number.

1390061 is a deficient number, since it is larger than the sum of its proper divisors (32371).

1390061 is an equidigital number, since it uses as much as digits as its factorization.

1390061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32370.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1390061 is about 1179.0084817337. The cubic root of 1390061 is about 111.6035355140.

Subtracting from 1390061 its sum of digits (20), we obtain a square (1390041 = 1179²).

Adding to 1390061 its reverse (1600931), we get a palindrome (2990992).

The spelling of 1390061 in words is "one million, three hundred ninety thousand, sixty-one".