1561461 has 8 divisors (see below), whose sum is σ = 2271264. Its totient is φ = 946320.

The previous prime is 1561457. The next prime is 1561463. The reversal of 1561461 is 1641651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1561461 - 2² = 1561457 is a prime.

1561461 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23626 + ... + 23691.

It is an arithmetic number, because the mean of its divisors is an integer number (283908).

2^1561461 is an apocalyptic number.

1561461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1561461 is a deficient number, since it is larger than the sum of its proper divisors (709803).

1561461 is a wasteful number, since it uses less digits than its factorization.

1561461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47331.

The product of its digits is 720, while the sum is 24.

The square root of 1561461 is about 1249.5843308877. The cubic root of 1561461 is about 116.0139945462.

The spelling of 1561461 in words is "one million, five hundred sixty-one thousand, four hundred sixty-one".