1557134 has 4 divisors (see below), whose sum is σ = 2335704. Its totient is φ = 778566.

The previous prime is 1557131. The next prime is 1557137. The reversal of 1557134 is 4317551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4317551 = 7 ⋅616793.

It is an interprime number because it is at equal distance from previous prime (1557131) and next prime (1557137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557131) 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 as a sum of consecutive naturals, namely, 389282 + ... + 389285.

It is an arithmetic number, because the mean of its divisors is an integer number (583926).

2^1557134 is an apocalyptic number.

1557134 is a deficient number, since it is larger than the sum of its proper divisors (778570).

1557134 is an equidigital number, since it uses as much as digits as its factorization.

1557134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778569.

The product of its digits is 2100, while the sum is 26.

The square root of 1557134 is about 1247.8517540157. The cubic root of 1557134 is about 115.9067324022.

The spelling of 1557134 in words is "one million, five hundred fifty-seven thousand, one hundred thirty-four".