1351816 has 8 divisors (see below), whose sum is σ = 2534670. Its totient is φ = 675904.

The previous prime is 1351813. The next prime is 1351829. The reversal of 1351816 is 6181531.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 119716 = 1110^2 + 346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1351813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84481 + ... + 84496.

2^1351816 is an apocalyptic number.

It is an amenable number.

1351816 is a deficient number, since it is larger than the sum of its proper divisors (1182854).

1351816 is a wasteful number, since it uses less digits than its factorization.

1351816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168983 (or 168979 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 1351816 is about 1162.6762232023. The cubic root of 1351816 is about 110.5704798006.

The spelling of 1351816 in words is "one million, three hundred fifty-one thousand, eight hundred sixteen".