1254740561 has 8 divisors (see below), whose sum is σ = 1259712000. Its totient is φ = 1249779520.

The previous prime is 1254740533. The next prime is 1254740579. The reversal of 1254740561 is 1650474521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1254740561 - 2¹⁸ = 1254478417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1254740761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307865 + ... + 311913.

It is an arithmetic number, because the mean of its divisors is an integer number (157464000).

Almost surely, 2^1254740561 is an apocalyptic number.

It is an amenable number.

1254740561 is a deficient number, since it is larger than the sum of its proper divisors (4971439).

1254740561 is an equidigital number, since it uses as much as digits as its factorization.

1254740561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 1254740561 is about 35422.3172731542. The cubic root of 1254740561 is about 1078.5773910364.

The spelling of 1254740561 in words is "one billion, two hundred fifty-four million, seven hundred forty thousand, five hundred sixty-one".