1497981 has 4 divisors (see below), whose sum is σ = 1997312. Its totient is φ = 998652.

The previous prime is 1497961. The next prime is 1497983. The reversal of 1497981 is 1897941.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1897941 = 3 ⋅632647.

It is not a de Polignac number, because 1497981 - 2⁵ = 1497949 is a prime.

It is a super-2 number, since 2×1497981² = 4487894152722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1497981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249661 + ... + 249666.

It is an arithmetic number, because the mean of its divisors is an integer number (499328).

2^1497981 is an apocalyptic number.

It is an amenable number.

1497981 is a deficient number, since it is larger than the sum of its proper divisors (499331).

1497981 is an equidigital number, since it uses as much as digits as its factorization.

1497981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499330.

The product of its digits is 18144, while the sum is 39.

The square root of 1497981 is about 1223.9203405451. The cubic root of 1497981 is about 114.4200416824.

The spelling of 1497981 in words is "one million, four hundred ninety-seven thousand, nine hundred eighty-one".