1542636 has 36 divisors (see below), whose sum is σ = 3959592. Its totient is φ = 506304.

The previous prime is 1542599. The next prime is 1542661. The reversal of 1542636 is 6362451.

1542636 = T₁₆₈ + T₁₆₉ + ... + T₂₄₀.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2335 + ... + 2921.

2^1542636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1542636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1979796).

1542636 is an abundant number, since it is smaller than the sum of its proper divisors (2416956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1542636 is a wasteful number, since it uses less digits than its factorization.

1542636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 665 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1542636 is about 1242.0289851690. The cubic root of 1542636 is about 115.5458860800.

The spelling of 1542636 in words is "one million, five hundred forty-two thousand, six hundred thirty-six".