1012455121 has 4 divisors (see below), whose sum is σ = 1013248000. Its totient is φ = 1011662244.

The previous prime is 1012455053. The next prime is 1012455127. The reversal of 1012455121 is 1215542101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012455121 - 2¹¹ = 1012453073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012455092 and 1012455101.

It is not an unprimeable number, because it can be changed into a prime (1012455127) 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, 394521 + ... + 397078.

It is an arithmetic number, because the mean of its divisors is an integer number (253312000).

Almost surely, 2^1012455121 is an apocalyptic number.

It is an amenable number.

1012455121 is a deficient number, since it is larger than the sum of its proper divisors (792879).

1012455121 is an equidigital number, since it uses as much as digits as its factorization.

1012455121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792878.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1012455121 is about 31819.0999401303. The cubic root of 1012455121 is about 1004.1345886169.

Adding to 1012455121 its reverse (1215542101), we get a palindrome (2227997222).

The spelling of 1012455121 in words is "one billion, twelve million, four hundred fifty-five thousand, one hundred twenty-one".