1561262 has 4 divisors (see below), whose sum is σ = 2341896. Its totient is φ = 780630.

The previous prime is 1561247. The next prime is 1561267. The reversal of 1561262 is 2621651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2621651 = 1249 ⋅2099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390314 + ... + 390317.

It is an arithmetic number, because the mean of its divisors is an integer number (585474).

2^1561262 is an apocalyptic number.

1561262 is a deficient number, since it is larger than the sum of its proper divisors (780634).

1561262 is an equidigital number, since it uses as much as digits as its factorization.

1561262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780633.

The product of its digits is 720, while the sum is 23.

The square root of 1561262 is about 1249.5047018719. The cubic root of 1561262 is about 116.0090658788.

The spelling of 1561262 in words is "one million, five hundred sixty-one thousand, two hundred sixty-two".