1541997 has 10 divisors (see below), whose sum is σ = 2303598. Its totient is φ = 1027944.

The previous prime is 1541987. The next prime is 1541999. The reversal of 1541997 is 7991451.

It can be written as a sum of positive squares in only one way, i.e., 826281 + 715716 = 909^2 + 846^2 .

It is not a de Polignac number, because 1541997 - 2⁶ = 1541933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541999) 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 9 ways as a sum of consecutive naturals, for example, 9438 + ... + 9599.

2^1541997 is an apocalyptic number.

It is an amenable number.

1541997 is a deficient number, since it is larger than the sum of its proper divisors (761601).

1541997 is an equidigital number, since it uses as much as digits as its factorization.

1541997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049 (or 19040 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 1541997 is about 1241.7717181511. The cubic root of 1541997 is about 115.5299298384.

The spelling of 1541997 in words is "one million, five hundred forty-one thousand, nine hundred ninety-seven".