1561460 has 24 divisors (see below), whose sum is σ = 3315816. Its totient is φ = 617600.

The previous prime is 1561457. The next prime is 1561463. The reversal of 1561460 is 641651.

It is an interprime number because it is at equal distance from previous prime (1561457) and next prime (1561463).

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 1378276 = 428^2 + 1174^2 .

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1634 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (138159).

2^1561460 is an apocalyptic number.

1561460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561460 is an abundant number, since it is smaller than the sum of its proper divisors (1754356).

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

1561460 is a wasteful number, since it uses less digits than its factorization.

1561460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 881 counting only the distinct ones).

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

The square root of 1561460 is about 1249.5839307546. The cubic root of 1561460 is about 116.0139697801.

The spelling of 1561460 in words is "one million, five hundred sixty-one thousand, four hundred sixty".