1001223145 has 32 divisors (see below), whose sum is σ = 1398862080. Its totient is φ = 681488640.

The previous prime is 1001223133. The next prime is 1001223149. The reversal of 1001223145 is 5413221001.

It is not a de Polignac number, because 1001223145 - 2⁷ = 1001223017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1001223149) 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, 34740 + ... + 56650.

It is an arithmetic number, because the mean of its divisors is an integer number (43714440).

Almost surely, 2^1001223145 is an apocalyptic number.

It is an amenable number.

1001223145 is a deficient number, since it is larger than the sum of its proper divisors (397638935).

1001223145 is a wasteful number, since it uses less digits than its factorization.

1001223145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21985.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1001223145 is about 31642.1103120509. The cubic root of 1001223145 is about 1000.4075488813.

Adding to 1001223145 its reverse (5413221001), we get a palindrome (6414444146).

The spelling of 1001223145 in words is "one billion, one million, two hundred twenty-three thousand, one hundred forty-five".