1012491205 has 16 divisors (see below), whose sum is σ = 1327411008. Its totient is φ = 735264000.

The previous prime is 1012491197. The next prime is 1012491281. The reversal of 1012491205 is 5021942101.

It is a happy number.

It is not a de Polignac number, because 1012491205 - 2³ = 1012491197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012491205.

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, 24685 + ... + 51325.

It is an arithmetic number, because the mean of its divisors is an integer number (82963188).

Almost surely, 2^1012491205 is an apocalyptic number.

It is an amenable number.

1012491205 is a deficient number, since it is larger than the sum of its proper divisors (314919803).

1012491205 is a wasteful number, since it uses less digits than its factorization.

1012491205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27348.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1012491205 is about 31819.6669530025. Note that the first 3 decimals coincide. The cubic root of 1012491205 is about 1004.1465176270.

The spelling of 1012491205 in words is "one billion, twelve million, four hundred ninety-one thousand, two hundred five".