1542621 has 8 divisors (see below), whose sum is σ = 2067424. Its totient is φ = 1023120.

The previous prime is 1542599. The next prime is 1542661. The reversal of 1542621 is 1262451.

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

It is not a de Polignac number, because 1542621 - 2⁵ = 1542589 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (258428).

2^1542621 is an apocalyptic number.

It is an amenable number.

1542621 is a deficient number, since it is larger than the sum of its proper divisors (524803).

1542621 is a wasteful number, since it uses less digits than its factorization.

1542621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651.

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

The square root of 1542621 is about 1242.0229466479. The cubic root of 1542621 is about 115.5455115709.

It can be divided in two parts, 154 and 2621, that added together give a triangular number (2775 = T₇₄).

The spelling of 1542621 in words is "one million, five hundred forty-two thousand, six hundred twenty-one".