1522661 has 8 divisors (see below), whose sum is σ = 1787520. Its totient is φ = 1269648.

The previous prime is 1522643. The next prime is 1522663. The reversal of 1522661 is 1662251.

1522661 = T₂₄₈ + T₂₄₉ + ... + T₂₈₉.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2681 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (223440).

2^1522661 is an apocalyptic number.

It is an amenable number.

1522661 is a deficient number, since it is larger than the sum of its proper divisors (264859).

1522661 is an equidigital number, since it uses as much as digits as its factorization.

1522661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923.

The product of its digits is 720, while the sum is 23.

The square root of 1522661 is about 1233.9615066930. The cubic root of 1522661 is about 115.0449981435.

The spelling of 1522661 in words is "one million, five hundred twenty-two thousand, six hundred sixty-one".