1267476321 has 4 divisors (see below), whose sum is σ = 1689968432. Its totient is φ = 844984212.

The previous prime is 1267476313. The next prime is 1267476347. The reversal of 1267476321 is 1236747621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1236747621 = 3 ⋅412249207.

It is not a de Polignac number, because 1267476321 - 2³ = 1267476313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267476321.

It is not an unprimeable number, because it can be changed into a prime (1267476391) 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, 211246051 + ... + 211246056.

It is an arithmetic number, because the mean of its divisors is an integer number (422492108).

Almost surely, 2^1267476321 is an apocalyptic number.

It is an amenable number.

1267476321 is a deficient number, since it is larger than the sum of its proper divisors (422492111).

1267476321 is an equidigital number, since it uses as much as digits as its factorization.

1267476321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422492110.

The product of its digits is 84672, while the sum is 39.

The square root of 1267476321 is about 35601.6336844252. The cubic root of 1267476321 is about 1082.2143413995.

The spelling of 1267476321 in words is "one billion, two hundred sixty-seven million, four hundred seventy-six thousand, three hundred twenty-one".