1251211453 has 2 divisors, whose sum is σ = 1251211454. Its totient is φ = 1251211452.

The previous prime is 1251211433. The next prime is 1251211457. The reversal of 1251211453 is 3541121521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810085444 + 441126009 = 28462^2 + 21003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251211453 - 2¹⁷ = 1251080381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251211457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625605726 + 625605727.

It is an arithmetic number, because the mean of its divisors is an integer number (625605727).

Almost surely, 2^1251211453 is an apocalyptic number.

It is an amenable number.

1251211453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251211453 is an equidigital number, since it uses as much as digits as its factorization.

1251211453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 1251211453 is about 35372.4674429138. The cubic root of 1251211453 is about 1077.5652321696.

Adding to 1251211453 its reverse (3541121521), we get a palindrome (4792332974).

The spelling of 1251211453 in words is "one billion, two hundred fifty-one million, two hundred eleven thousand, four hundred fifty-three".