1477981 has 4 divisors (see below), whose sum is σ = 1495872. Its totient is φ = 1460092.

The previous prime is 1477979. The next prime is 1477999. The reversal of 1477981 is 1897741.

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 1477981 - 2¹ = 1477979 is a prime.

It is a super-2 number, since 2×1477981² = 4368855672722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1477981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1477901) 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, 8821 + ... + 8986.

It is an arithmetic number, because the mean of its divisors is an integer number (373968).

2^1477981 is an apocalyptic number.

It is an amenable number.

1477981 is a deficient number, since it is larger than the sum of its proper divisors (17891).

1477981 is an equidigital number, since it uses as much as digits as its factorization.

1477981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17890.

The product of its digits is 14112, while the sum is 37.

The square root of 1477981 is about 1215.7224189756. The cubic root of 1477981 is about 113.9085395488.

It can be divided in two parts, 147 and 7981, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 1477981 in words is "one million, four hundred seventy-seven thousand, nine hundred eighty-one".