1356990 has 16 divisors (see below), whose sum is σ = 3256848. Its totient is φ = 361856.

The previous prime is 1356973. The next prime is 1357001. The reversal of 1356990 is 996531.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22587 + ... + 22646.

It is an arithmetic number, because the mean of its divisors is an integer number (203553).

2^1356990 is an apocalyptic number.

1356990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1356990 is an abundant number, since it is smaller than the sum of its proper divisors (1899858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356990 is a wasteful number, since it uses less digits than its factorization.

1356990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45243.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 1356990 is about 1164.8991372647. The cubic root of 1356990 is about 110.7113676452.

It can be divided in two parts, 1356 and 990, that added together give a triangular number (2346 = T₆₈).

The spelling of 1356990 in words is "one million, three hundred fifty-six thousand, nine hundred ninety".