1561454051 has 2 divisors, whose sum is σ = 1561454052. Its totient is φ = 1561454050.

The previous prime is 1561453997. The next prime is 1561454093. The reversal of 1561454051 is 1504541651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1561454051 - 2⁶ = 1561453987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561453999 and 1561454017.

It is not a weakly prime, because it can be changed into another prime (1561454551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780727025 + 780727026.

It is an arithmetic number, because the mean of its divisors is an integer number (780727026).

Almost surely, 2^1561454051 is an apocalyptic number.

1561454051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561454051 is an equidigital number, since it uses as much as digits as its factorization.

1561454051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1561454051 is about 39515.2382126187. The cubic root of 1561454051 is about 1160.1382244621.

The spelling of 1561454051 in words is "one billion, five hundred sixty-one million, four hundred fifty-four thousand, fifty-one".