1491970 has 8 divisors (see below), whose sum is σ = 2685564. Its totient is φ = 596784.

The previous prime is 1491967. The next prime is 1491977. The reversal of 1491970 is 791941.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 221841 = 1127^2 + 471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1491977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74589 + ... + 74608.

2^1491970 is an apocalyptic number.

1491970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491970 is a deficient number, since it is larger than the sum of its proper divisors (1193594).

1491970 is a wasteful number, since it uses less digits than its factorization.

1491970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149204.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1491970 is about 1221.4622384667. The cubic root of 1491970 is about 114.2667907656.

The spelling of 1491970 in words is "one million, four hundred ninety-one thousand, nine hundred seventy".