1267453997 has 2 divisors, whose sum is σ = 1267453998. Its totient is φ = 1267453996.

The previous prime is 1267453987. The next prime is 1267454009. The reversal of 1267453997 is 7993547621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695957161 + 571496836 = 26381^2 + 23906^2 .

It is an emirp because it is prime and its reverse (7993547621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1267453997 - 2¹⁶ = 1267388461 is a prime.

It is a super-2 number, since 2×1267453997² = 3212879269022552018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267453987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633726998 + 633726999.

It is an arithmetic number, because the mean of its divisors is an integer number (633726999).

Almost surely, 2^1267453997 is an apocalyptic number.

It is an amenable number.

1267453997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267453997 is an equidigital number, since it uses as much as digits as its factorization.

1267453997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 53.

The square root of 1267453997 is about 35601.3201581065. The cubic root of 1267453997 is about 1082.2079876990.

The spelling of 1267453997 in words is "one billion, two hundred sixty-seven million, four hundred fifty-three thousand, nine hundred ninety-seven".