1531057 has 4 divisors (see below), whose sum is σ = 1670256. Its totient is φ = 1391860.

The previous prime is 1531051. The next prime is 1531081. The reversal of 1531057 is 7501351.

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.

It is a cyclic number.

It is not a de Polignac number, because 1531057 - 2¹¹ = 1529009 is a prime.

It is a Duffinian number.

1531057 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1531051) 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, 69583 + ... + 69604.

It is an arithmetic number, because the mean of its divisors is an integer number (417564).

2^1531057 is an apocalyptic number.

It is an amenable number.

1531057 is a deficient number, since it is larger than the sum of its proper divisors (139199).

1531057 is a wasteful number, since it uses less digits than its factorization.

1531057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139198.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 1531057 is about 1237.3588808426. The cubic root of 1531057 is about 115.2560645717.

The spelling of 1531057 in words is "one million, five hundred thirty-one thousand, fifty-seven".