1861367145 has 32 divisors (see below), whose sum is σ = 3440050560. Its totient is φ = 849392640.

The previous prime is 1861367087. The next prime is 1861367147. The reversal of 1861367145 is 5417631681.

1861367145 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1861367145 - 2⁷ = 1861367017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1861367097 and 1861367106.

It is not an unprimeable number, because it can be changed into a prime (1861367147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328990 + ... + 334599.

It is an arithmetic number, because the mean of its divisors is an integer number (107501580).

Almost surely, 2^1861367145 is an apocalyptic number.

1861367145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1861367145 is a deficient number, since it is larger than the sum of its proper divisors (1578683415).

1861367145 is a wasteful number, since it uses less digits than its factorization.

1861367145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663625.

The product of its digits is 120960, while the sum is 42.

The square root of 1861367145 is about 43143.5643520560. The cubic root of 1861367145 is about 1230.1101857798.

It can be divided in two parts, 18613 and 67145, that added together give a palindrome (85758).

The spelling of 1861367145 in words is "one billion, eight hundred sixty-one million, three hundred sixty-seven thousand, one hundred forty-five".