1361057121 has 16 divisors (see below), whose sum is σ = 2023832320. Its totient is φ = 904018320.

The previous prime is 1361057107. The next prime is 1361057143. The reversal of 1361057121 is 1217501631.

1361057121 is a `hidden beast` number, since 13 + 61 + 0 + 571 + 21 = 666.

It is not a de Polignac number, because 1361057121 - 2⁶ = 1361057057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1361057171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85690 + ... + 100323.

It is an arithmetic number, because the mean of its divisors is an integer number (126489520).

Almost surely, 2^1361057121 is an apocalyptic number.

It is an amenable number.

1361057121 is a deficient number, since it is larger than the sum of its proper divisors (662775199).

1361057121 is a wasteful number, since it uses less digits than its factorization.

1361057121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186293 (or 186287 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1361057121 is about 36892.5076539939. The cubic root of 1361057121 is about 1108.2186401954.

Adding to 1361057121 its reverse (1217501631), we get a palindrome (2578558752).

The spelling of 1361057121 in words is "one billion, three hundred sixty-one million, fifty-seven thousand, one hundred twenty-one".