1351649 has 8 divisors (see below), whose sum is σ = 1466472. Its totient is φ = 1238400.

The previous prime is 1351639. The next prime is 1351663. The reversal of 1351649 is 9461531.

1351649 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 462400 + 889249 = 680^2 + 943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351649 - 2¹² = 1347553 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1351639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (183309).

2^1351649 is an apocalyptic number.

It is an amenable number.

1351649 is a deficient number, since it is larger than the sum of its proper divisors (114823).

1351649 is a wasteful number, since it uses less digits than its factorization.

1351649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 3240, while the sum is 29.

The square root of 1351649 is about 1162.6044039139. The cubic root of 1351649 is about 110.5659264120.

The spelling of 1351649 in words is "one million, three hundred fifty-one thousand, six hundred forty-nine".