1355649 has 8 divisors (see below), whose sum is σ = 1814592. Its totient is φ = 900240.

The previous prime is 1355647. The next prime is 1355657. The reversal of 1355649 is 9465531.

It is a happy number.

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

It is not a de Polignac number, because 1355649 - 2¹ = 1355647 is a prime.

It is a super-2 number, since 2×1355649² = 3675568422402, which contains 22 as substring.

1355649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1355647) 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, 207 + ... + 1659.

It is an arithmetic number, because the mean of its divisors is an integer number (226824).

2^1355649 is an apocalyptic number.

It is an amenable number.

1355649 is a deficient number, since it is larger than the sum of its proper divisors (458943).

1355649 is a wasteful number, since it uses less digits than its factorization.

1355649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767.

The product of its digits is 16200, while the sum is 33.

The square root of 1355649 is about 1164.3234086799. The cubic root of 1355649 is about 110.6748866896.

The spelling of 1355649 in words is "one million, three hundred fifty-five thousand, six hundred forty-nine".