1561341254 has 32 divisors (see below), whose sum is σ = 2623864320. Its totient is φ = 690638400.

The previous prime is 1561341253. The next prime is 1561341263. The reversal of 1561341254 is 4521431651.

It is a super-2 number, since 2×1561341254² = 4875573022884585032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1561341254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561341253) 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 15 ways as a sum of consecutive naturals, for example, 394007 + ... + 397949.

It is an arithmetic number, because the mean of its divisors is an integer number (81995760).

Almost surely, 2^1561341254 is an apocalyptic number.

1561341254 is a deficient number, since it is larger than the sum of its proper divisors (1062523066).

1561341254 is a wasteful number, since it uses less digits than its factorization.

1561341254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436.

The product of its digits is 14400, while the sum is 32.

The square root of 1561341254 is about 39513.8109273201. The cubic root of 1561341254 is about 1160.1102882654.

The spelling of 1561341254 in words is "one billion, five hundred sixty-one million, three hundred forty-one thousand, two hundred fifty-four".