1861474051 has 2 divisors, whose sum is σ = 1861474052. Its totient is φ = 1861474050.

The previous prime is 1861474037. The next prime is 1861474073. The reversal of 1861474051 is 1504741681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1861474051 - 2¹¹ = 1861472003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1861474051.

It is not a weakly prime, because it can be changed into another prime (1861474451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930737025 + 930737026.

It is an arithmetic number, because the mean of its divisors is an integer number (930737026).

Almost surely, 2^1861474051 is an apocalyptic number.

1861474051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861474051 is an equidigital number, since it uses as much as digits as its factorization.

1861474051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1861474051 is about 43144.8032907788. The cubic root of 1861474051 is about 1230.1337354311.

It can be divided in two parts, 18614 and 74051, that added together give a triangular number (92665 = T₄₃₀).

The spelling of 1861474051 in words is "one billion, eight hundred sixty-one million, four hundred seventy-four thousand, fifty-one".