1542381 has 4 divisors (see below), whose sum is σ = 2056512. Its totient is φ = 1028252.

The previous prime is 1542377. The next prime is 1542383. The reversal of 1542381 is 1832451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1832451 = 3 ⋅610817.

It is a cyclic number.

It is not a de Polignac number, because 1542381 - 2² = 1542377 is a prime.

It is a super-2 number, since 2×1542381² = 4757878298322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257061 + ... + 257066.

It is an arithmetic number, because the mean of its divisors is an integer number (514128).

2^1542381 is an apocalyptic number.

It is an amenable number.

1542381 is a deficient number, since it is larger than the sum of its proper divisors (514131).

1542381 is an equidigital number, since it uses as much as digits as its factorization.

1542381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514130.

The product of its digits is 960, while the sum is 24.

The square root of 1542381 is about 1241.9263263173. The cubic root of 1542381 is about 115.5395190942.

The spelling of 1542381 in words is "one million, five hundred forty-two thousand, three hundred eighty-one".