1861401741 has 8 divisors (see below), whose sum is σ = 2511771360. Its totient is φ = 1225983312.

The previous prime is 1861401719. The next prime is 1861401767. The reversal of 1861401741 is 1471041681.

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

It is not a de Polignac number, because 1861401741 - 2¹⁷ = 1861270669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861401781) 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 in 7 ways as a sum of consecutive naturals, for example, 3737506 + ... + 3738003.

It is an arithmetic number, because the mean of its divisors is an integer number (313971420).

Almost surely, 2^1861401741 is an apocalyptic number.

It is an amenable number.

1861401741 is a deficient number, since it is larger than the sum of its proper divisors (650369619).

1861401741 is an equidigital number, since it uses as much as digits as its factorization.

1861401741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475595.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1861401741 is about 43143.9652906406. The cubic root of 1861401741 is about 1230.1178068140.

The spelling of 1861401741 in words is "one billion, eight hundred sixty-one million, four hundred one thousand, seven hundred forty-one".