1073145861 has 8 divisors (see below), whose sum is σ = 1589845760. Its totient is φ = 715430556.

The previous prime is 1073145839. The next prime is 1073145881. The reversal of 1073145861 is 1685413701.

1073145861 is a `hidden beast` number, since 1 + 0 + 73 + 1 + 4 + 586 + 1 = 666.

It is not a de Polignac number, because 1073145861 - 2¹³ = 1073137669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1073145811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19873045 + ... + 19873098.

It is an arithmetic number, because the mean of its divisors is an integer number (198730720).

Almost surely, 2^1073145861 is an apocalyptic number.

It is an amenable number.

1073145861 is a deficient number, since it is larger than the sum of its proper divisors (516699899).

1073145861 is an equidigital number, since it uses as much as digits as its factorization.

1073145861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39746152 (or 39746146 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1073145861 is about 32758.9050641196. The cubic root of 1073145861 is about 1023.8105134030.

The spelling of 1073145861 in words is "one billion, seventy-three million, one hundred forty-five thousand, eight hundred sixty-one".