1249677451 has 4 divisors (see below), whose sum is σ = 1363284504. Its totient is φ = 1136070400.

The previous prime is 1249677439. The next prime is 1249677491. The reversal of 1249677451 is 1547769421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1249677451 - 2⁵ = 1249677419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249677431) 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, 56803510 + ... + 56803531.

It is an arithmetic number, because the mean of its divisors is an integer number (340821126).

Almost surely, 2^1249677451 is an apocalyptic number.

1249677451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1249677451 is a deficient number, since it is larger than the sum of its proper divisors (113607053).

1249677451 is a wasteful number, since it uses less digits than its factorization.

1249677451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113607052.

The product of its digits is 423360, while the sum is 46.

The square root of 1249677451 is about 35350.7772333226. Note that the first 3 decimals coincide. The cubic root of 1249677451 is about 1077.1246822780.

The spelling of 1249677451 in words is "one billion, two hundred forty-nine million, six hundred seventy-seven thousand, four hundred fifty-one".