1561424 has 20 divisors (see below), whose sum is σ = 3157536. Its totient is φ = 746592.

The previous prime is 1561423. The next prime is 1561429. The reversal of 1561424 is 4241651.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 1561424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1754 + ... + 2489.

2^1561424 is an apocalyptic number.

It is an amenable number.

1561424 is an abundant number, since it is smaller than the sum of its proper divisors (1596112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561424 is a wasteful number, since it uses less digits than its factorization.

1561424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274 (or 4268 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1561424 is about 1249.5695258768. The cubic root of 1561424 is about 116.0130781925.

The spelling of 1561424 in words is "one million, five hundred sixty-one thousand, four hundred twenty-four".