1542261 has 12 divisors (see below), whose sum is σ = 2358816. Its totient is φ = 878040.

The previous prime is 1542259. The next prime is 1542283. The reversal of 1542261 is 1622451.

It is not a de Polignac number, because 1542261 - 2¹ = 1542259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1542261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542221) 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 11 ways as a sum of consecutive naturals, for example, 5556 + ... + 5826.

It is an arithmetic number, because the mean of its divisors is an integer number (196568).

2^1542261 is an apocalyptic number.

It is an amenable number.

1542261 is a deficient number, since it is larger than the sum of its proper divisors (816555).

1542261 is an frugal number, since it uses more digits than its factorization.

1542261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 281 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1542261 is about 1241.8780133330. The cubic root of 1542261 is about 115.5365226227.

Multiplying 1542261 by its sum of digits (21), we get a square (32387481 = 5691²).

1542261 divided by its sum of digits (21) gives a square (73441 = 271²).

It can be divided in two parts, 154 and 2261, that added together give a triangular number (2415 = T₆₉).

The spelling of 1542261 in words is "one million, five hundred forty-two thousand, two hundred sixty-one".