1561022 has 8 divisors (see below), whose sum is σ = 2381400. Its totient is φ = 767224.

The previous prime is 1561019. The next prime is 1561037. The reversal of 1561022 is 2201651.

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

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, 6497 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (297675).

2^1561022 is an apocalyptic number.

1561022 is a deficient number, since it is larger than the sum of its proper divisors (820378).

1561022 is a wasteful number, since it uses less digits than its factorization.

1561022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1561022 is about 1249.4086601269. The cubic root of 1561022 is about 116.0031212002.

Adding to 1561022 its reverse (2201651), we get a palindrome (3762673).

The spelling of 1561022 in words is "one million, five hundred sixty-one thousand, twenty-two".