1145013661 has 4 divisors (see below), whose sum is σ = 1249105824. Its totient is φ = 1040921500.

The previous prime is 1145013659. The next prime is 1145013673. The reversal of 1145013661 is 1663105411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145013661 - 2¹ = 1145013659 is a prime.

It is a super-2 number, since 2×1145013661² = 2622112567753245842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145013691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52046065 + ... + 52046086.

It is an arithmetic number, because the mean of its divisors is an integer number (312276456).

Almost surely, 2^1145013661 is an apocalyptic number.

1145013661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1145013661 is a deficient number, since it is larger than the sum of its proper divisors (104092163).

1145013661 is a wasteful number, since it uses less digits than its factorization.

1145013661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104092162.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1145013661 is about 33838.0504905351. The cubic root of 1145013661 is about 1046.1731172168.

The spelling of 1145013661 in words is "one billion, one hundred forty-five million, thirteen thousand, six hundred sixty-one".