1561254 has 8 divisors (see below), whose sum is σ = 3122520. Its totient is φ = 520416.

The previous prime is 1561247. The next prime is 1561267. The reversal of 1561254 is 4521651.

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

1561254 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130099 + ... + 130110.

It is an arithmetic number, because the mean of its divisors is an integer number (390315).

2^1561254 is an apocalyptic number.

1561254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1561254 is a wasteful number, since it uses less digits than its factorization.

1561254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260214.

The product of its digits is 1200, while the sum is 24.

The square root of 1561254 is about 1249.5015005993. The cubic root of 1561254 is about 116.0088677327.

The spelling of 1561254 in words is "one million, five hundred sixty-one thousand, two hundred fifty-four".