1012661217 has 8 divisors (see below), whose sum is σ = 1500238880. Its totient is φ = 675107460.

The previous prime is 1012661197. The next prime is 1012661267. The reversal of 1012661217 is 7121662101.

It is a happy number.

1012661217 is a `hidden beast` number, since 10 + 1 + 26 + 612 + 17 = 666.

It is not a de Polignac number, because 1012661217 - 2¹⁴ = 1012644833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 37505971 = 1012661217 / (1 + 0 + 1 + 2 + 6 + 6 + 1 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012661267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18752959 + ... + 18753012.

It is an arithmetic number, because the mean of its divisors is an integer number (187529860).

Almost surely, 2^1012661217 is an apocalyptic number.

It is an amenable number.

1012661217 is a deficient number, since it is larger than the sum of its proper divisors (487577663).

1012661217 is an equidigital number, since it uses as much as digits as its factorization.

1012661217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37505980 (or 37505974 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1012661217 is about 31822.3383333155. The cubic root of 1012661217 is about 1004.2027180834.

The spelling of 1012661217 in words is "one billion, twelve million, six hundred sixty-one thousand, two hundred seventeen".