1254780989 has 32 divisors (see below), whose sum is σ = 1600300800. Its totient is φ = 955468800.

The previous prime is 1254780983. The next prime is 1254781027. The reversal of 1254780989 is 9890874521.

It is not a de Polignac number, because 1254780989 - 2⁴ = 1254780973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1254780989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254780983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1423829 + ... + 1424709.

It is an arithmetic number, because the mean of its divisors is an integer number (50009400).

Almost surely, 2^1254780989 is an apocalyptic number.

It is an amenable number.

1254780989 is a deficient number, since it is larger than the sum of its proper divisors (345519811).

1254780989 is a wasteful number, since it uses less digits than its factorization.

1254780989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 1254780989 is about 35422.8879257465. The cubic root of 1254780989 is about 1078.5889749074.

The spelling of 1254780989 in words is "one billion, two hundred fifty-four million, seven hundred eighty thousand, nine hundred eighty-nine".