1254742566 has 32 divisors (see below), whose sum is σ = 3128709888. Its totient is φ = 325907040.

The previous prime is 1254742547. The next prime is 1254742583. The reversal of 1254742566 is 6652474521.

It is a super-3 number, since 3×1254742566³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357485 + ... + 1358408.

It is an arithmetic number, because the mean of its divisors is an integer number (97772184).

Almost surely, 2^1254742566 is an apocalyptic number.

1254742566 is an abundant number, since it is smaller than the sum of its proper divisors (1873967322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1254742566 is a wasteful number, since it uses less digits than its factorization.

1254742566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715916.

The product of its digits is 403200, while the sum is 42.

The square root of 1254742566 is about 35422.3455745099. The cubic root of 1254742566 is about 1078.5779655367.

The spelling of 1254742566 in words is "one billion, two hundred fifty-four million, seven hundred forty-two thousand, five hundred sixty-six".