1291023954 has 64 divisors (see below), whose sum is σ = 3230760960. Its totient is φ = 378594000.

The previous prime is 1291023917. The next prime is 1291023977. The reversal of 1291023954 is 4593201921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16642 + ... + 53469.

It is an arithmetic number, because the mean of its divisors is an integer number (50480640).

Almost surely, 2^1291023954 is an apocalyptic number.

1291023954 is an abundant number, since it is smaller than the sum of its proper divisors (1939737006).

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

1291023954 is a wasteful number, since it uses less digits than its factorization.

1291023954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70164 (or 70158 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1291023954 is about 35930.8217829762. The cubic root of 1291023954 is about 1088.8751839583.

It can be divided in two parts, 12910 and 23954, that added together give a square (36864 = 192²).

The spelling of 1291023954 in words is "one billion, two hundred ninety-one million, twenty-three thousand, nine hundred fifty-four".