1491297950 has 24 divisors (see below), whose sum is σ = 2848785672. Its totient is φ = 580396320.

The previous prime is 1491297911. The next prime is 1491297959. The reversal of 1491297950 is 597921941.

It is a junction number, because it is equal to n+sod(n) for n = 1491297895 and 1491297904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491297959) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 401204 + ... + 404903.

It is an arithmetic number, because the mean of its divisors is an integer number (118699403).

Almost surely, 2^1491297950 is an apocalyptic number.

1491297950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491297950 is a deficient number, since it is larger than the sum of its proper divisors (1357487722).

1491297950 is a wasteful number, since it uses less digits than its factorization.

1491297950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806156 (or 806151 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 1491297950 is about 38617.3270695940. The cubic root of 1491297950 is about 1142.4963123158.

The spelling of 1491297950 in words is "one billion, four hundred ninety-one million, two hundred ninety-seven thousand, nine hundred fifty".