1669542 has 32 divisors (see below), whose sum is σ = 3858432. Its totient is φ = 471744.

The previous prime is 1669541. The next prime is 1669543. The reversal of 1669542 is 2459661.

It is an interprime number because it is at equal distance from previous prime (1669541) and next prime (1669543).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5178 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (120576).

2^1669542 is an apocalyptic number.

1669542 is an abundant number, since it is smaller than the sum of its proper divisors (2188890).

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

1669542 is a wasteful number, since it uses less digits than its factorization.

1669542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

The product of its digits is 12960, while the sum is 33.

The square root of 1669542 is about 1292.1075806604. The cubic root of 1669542 is about 118.6312526707.

It can be divided in two parts, 1669 and 542, that added together give a triangular number (2211 = T₆₆).

The spelling of 1669542 in words is "one million, six hundred sixty-nine thousand, five hundred forty-two".