1491945 has 32 divisors (see below), whose sum is σ = 2940672. Its totient is φ = 628992.

The previous prime is 1491943. The next prime is 1491947. The reversal of 1491945 is 5491941.

It is an interprime number because it is at equal distance from previous prime (1491943) and next prime (1491947).

It is not a de Polignac number, because 1491945 - 2¹ = 1491943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491943) 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, 819 + ... + 1911.

It is an arithmetic number, because the mean of its divisors is an integer number (91896).

2^1491945 is an apocalyptic number.

1491945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1491945 is a deficient number, since it is larger than the sum of its proper divisors (1448727).

1491945 is a wasteful number, since it uses less digits than its factorization.

1491945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 6480, while the sum is 33.

The square root of 1491945 is about 1221.4520047877. The cubic root of 1491945 is about 114.2661525299.

The spelling of 1491945 in words is "one million, four hundred ninety-one thousand, nine hundred forty-five".