1947481 has 4 divisors (see below), whose sum is σ = 2050000. Its totient is φ = 1844964.

The previous prime is 1947467. The next prime is 1947487. The reversal of 1947481 is 1847491.

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: 1847491 = 71 ⋅26021.

It is a cyclic number.

It is not a de Polignac number, because 1947481 - 2⁹ = 1946969 is a prime.

It is a super-2 number, since 2×1947481² = 7585364490722, which contains 22 as substring.

It is a Duffinian number.

1947481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1947487) 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, 51231 + ... + 51268.

It is an arithmetic number, because the mean of its divisors is an integer number (512500).

2^1947481 is an apocalyptic number.

It is an amenable number.

1947481 is a deficient number, since it is larger than the sum of its proper divisors (102519).

1947481 is a wasteful number, since it uses less digits than its factorization.

1947481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102518.

The product of its digits is 8064, while the sum is 34.

The square root of 1947481 is about 1395.5217662222. The cubic root of 1947481 is about 124.8794785006.

The spelling of 1947481 in words is "one million, nine hundred forty-seven thousand, four hundred eighty-one".