1001212045 has 16 divisors (see below), whose sum is σ = 1239366960. Its totient is φ = 775885824.

The previous prime is 1001212019. The next prime is 1001212067. The reversal of 1001212045 is 5402121001.

It can be written as a sum of positive squares in 8 ways, for example, as 375661924 + 625550121 = 19382^2 + 25011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001212045 - 2⁵ = 1001212013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30549 + ... + 54181.

It is an arithmetic number, because the mean of its divisors is an integer number (77460435).

Almost surely, 2^1001212045 is an apocalyptic number.

It is an amenable number.

1001212045 is a deficient number, since it is larger than the sum of its proper divisors (238154915).

1001212045 is a wasteful number, since it uses less digits than its factorization.

1001212045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23904.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1001212045 is about 31641.9349123912. The cubic root of 1001212045 is about 1000.4038518817.

Adding to 1001212045 its reverse (5402121001), we get a palindrome (6403333046).

The spelling of 1001212045 in words is "one billion, one million, two hundred twelve thousand, forty-five".