1977485 has 8 divisors (see below), whose sum is σ = 2380536. Its totient is φ = 1576960.

The previous prime is 1977433. The next prime is 1977499. The reversal of 1977485 is 5847791.

It can be written as a sum of positive squares in 4 ways, for example, as 119716 + 1857769 = 346^2 + 1363^2 .

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

It is not a de Polignac number, because 1977485 - 2¹⁸ = 1715341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2765 + ... + 3405.

It is an arithmetic number, because the mean of its divisors is an integer number (297567).

2^1977485 is an apocalyptic number.

It is an amenable number.

1977485 is a deficient number, since it is larger than the sum of its proper divisors (403051).

1977485 is an equidigital number, since it uses as much as digits as its factorization.

1977485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263.

The product of its digits is 70560, while the sum is 41.

The square root of 1977485 is about 1406.2307776464. The cubic root of 1977485 is about 125.5175343087.

The spelling of 1977485 in words is "one million, nine hundred seventy-seven thousand, four hundred eighty-five".