1520667 has 16 divisors (see below), whose sum is σ = 2386080. Its totient is φ = 953856.

The previous prime is 1520653. The next prime is 1520681. The reversal of 1520667 is 7660251.

It is an interprime number because it is at equal distance from previous prime (1520653) and next prime (1520681).

It is not a de Polignac number, because 1520667 - 2⁷ = 1520539 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1520667.

It is not an unprimeable number, because it can be changed into a prime (1530667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1198 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (149130).

2^1520667 is an apocalyptic number.

1520667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1520667 is a deficient number, since it is larger than the sum of its proper divisors (865413).

1520667 is a wasteful number, since it uses less digits than its factorization.

1520667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339 (or 3333 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1520667 is about 1233.1532751447. The cubic root of 1520667 is about 114.9947571649.

It can be divided in two parts, 1520 and 667, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1520667 in words is "one million, five hundred twenty thousand, six hundred sixty-seven".