1294991742 has 16 divisors (see below), whose sum is σ = 2825436672. Its totient is φ = 392421720.

The previous prime is 1294991729. The next prime is 1294991743. The reversal of 1294991742 is 2471994921.

It is a super-2 number, since 2×1294991742² = 3354007223696389128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1294991691 and 1294991700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1294991743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9810478 + ... + 9810609.

It is an arithmetic number, because the mean of its divisors is an integer number (176589792).

Almost surely, 2^1294991742 is an apocalyptic number.

1294991742 is an abundant number, since it is smaller than the sum of its proper divisors (1530444930).

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

1294991742 is a wasteful number, since it uses less digits than its factorization.

1294991742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19621103.

The product of its digits is 326592, while the sum is 48.

The square root of 1294991742 is about 35985.9936919908. The cubic root of 1294991742 is about 1089.9895467954.

The spelling of 1294991742 in words is "one billion, two hundred ninety-four million, nine hundred ninety-one thousand, seven hundred forty-two".