1493657 has 4 divisors (see below), whose sum is σ = 1629456. Its totient is φ = 1357860.

The previous prime is 1493651. The next prime is 1493659. The reversal of 1493657 is 7563941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1493657 - 2⁴ = 1493641 is a prime.

It is a super-2 number, since 2×1493657² = 4462022467298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1493651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67883 + ... + 67904.

It is an arithmetic number, because the mean of its divisors is an integer number (407364).

2^1493657 is an apocalyptic number.

It is an amenable number.

1493657 is a deficient number, since it is larger than the sum of its proper divisors (135799).

1493657 is a wasteful number, since it uses less digits than its factorization.

1493657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135798.

The product of its digits is 22680, while the sum is 35.

The square root of 1493657 is about 1222.1526091287. The cubic root of 1493657 is about 114.3098424503.

The spelling of 1493657 in words is "one million, four hundred ninety-three thousand, six hundred fifty-seven".