1294942491 has 32 divisors (see below), whose sum is σ = 1935360000. Its totient is φ = 855719424.

The previous prime is 1294942477. The next prime is 1294942499. The reversal of 1294942491 is 1942494921.

It is a happy number.

It is not a de Polignac number, because 1294942491 - 2⁶ = 1294942427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1294942499) 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, 2703190 + ... + 2703668.

It is an arithmetic number, because the mean of its divisors is an integer number (60480000).

Almost surely, 2^1294942491 is an apocalyptic number.

1294942491 is a deficient number, since it is larger than the sum of its proper divisors (640417509).

1294942491 is a wasteful number, since it uses less digits than its factorization.

1294942491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1154 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1294942491 is about 35985.3093775780. The cubic root of 1294942491 is about 1089.9757284947.

The spelling of 1294942491 in words is "one billion, two hundred ninety-four million, nine hundred forty-two thousand, four hundred ninety-one".