1947561 has 16 divisors (see below), whose sum is σ = 3237888. Its totient is φ = 1011600.

The previous prime is 1947551. The next prime is 1947593. The reversal of 1947561 is 1657491.

It is not a de Polignac number, because 1947561 - 2⁶ = 1947497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1947511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3985 + ... + 4446.

It is an arithmetic number, because the mean of its divisors is an integer number (202368).

2^1947561 is an apocalyptic number.

1947561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1947561 is a deficient number, since it is larger than the sum of its proper divisors (1290327).

1947561 is a wasteful number, since it uses less digits than its factorization.

1947561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452.

The product of its digits is 7560, while the sum is 33.

The square root of 1947561 is about 1395.5504290422. The cubic root of 1947561 is about 124.8811884396.

The spelling of 1947561 in words is "one million, nine hundred forty-seven thousand, five hundred sixty-one".