1356780 has 24 divisors (see below), whose sum is σ = 3799152. Its totient is φ = 361792.

The previous prime is 1356763. The next prime is 1356811. The reversal of 1356780 is 876531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 12.

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, 11247 + ... + 11366.

It is an arithmetic number, because the mean of its divisors is an integer number (158298).

2^1356780 is an apocalyptic number.

1356780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356780 is an abundant number, since it is smaller than the sum of its proper divisors (2442372).

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

1356780 is a wasteful number, since it uses less digits than its factorization.

1356780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22625 (or 22623 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1356780 is about 1164.8089972180. The cubic root of 1356780 is about 110.7056563315.

Subtracting from 1356780 its reverse (876531), we obtain a square (480249 = 693²).

The spelling of 1356780 in words is "one million, three hundred fifty-six thousand, seven hundred eighty".