1012521307 has 4 divisors (see below), whose sum is σ = 1157167216. Its totient is φ = 867875400.

The previous prime is 1012521239. The next prime is 1012521337. The reversal of 1012521307 is 7031252101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1012521307 - 2⁷ = 1012521179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012521337) 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, 72322944 + ... + 72322957.

It is an arithmetic number, because the mean of its divisors is an integer number (289291804).

Almost surely, 2^1012521307 is an apocalyptic number.

1012521307 is a deficient number, since it is larger than the sum of its proper divisors (144645909).

1012521307 is an equidigital number, since it uses as much as digits as its factorization.

1012521307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144645908.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1012521307 is about 31820.1399588374. The cubic root of 1012521307 is about 1004.1564688308.

Adding to 1012521307 its reverse (7031252101), we get a palindrome (8043773408).

The spelling of 1012521307 in words is "one billion, twelve million, five hundred twenty-one thousand, three hundred seven".