1497661 has 8 divisors (see below), whose sum is σ = 1645344. Its totient is φ = 1351920.

The previous prime is 1497659. The next prime is 1497667. The reversal of 1497661 is 1667941.

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 1497661 - 2¹ = 1497659 is a prime.

It is a Duffinian number.

1497661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (205668).

2^1497661 is an apocalyptic number.

1497661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1497661 is a deficient number, since it is larger than the sum of its proper divisors (147683).

1497661 is a wasteful number, since it uses less digits than its factorization.

1497661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 9072, while the sum is 34.

The square root of 1497661 is about 1223.7896061007. The cubic root of 1497661 is about 114.4118935994.

The spelling of 1497661 in words is "one million, four hundred ninety-seven thousand, six hundred sixty-one".