1254737749 has 2 divisors, whose sum is σ = 1254737750. Its totient is φ = 1254737748.

The previous prime is 1254737639. The next prime is 1254737831. The reversal of 1254737749 is 9477374521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254222225 + 515524 = 35415^2 + 718^2 .

It is an emirp because it is prime and its reverse (9477374521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254737749 - 2⁷ = 1254737621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254731749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627368874 + 627368875.

It is an arithmetic number, because the mean of its divisors is an integer number (627368875).

Almost surely, 2^1254737749 is an apocalyptic number.

It is an amenable number.

1254737749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254737749 is an equidigital number, since it uses as much as digits as its factorization.

1254737749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 49.

The square root of 1254737749 is about 35422.2775806413. The cubic root of 1254737749 is about 1078.5765853022.

The spelling of 1254737749 in words is "one billion, two hundred fifty-four million, seven hundred thirty-seven thousand, seven hundred forty-nine".