1390557 has 16 divisors (see below), whose sum is σ = 2211840. Its totient is φ = 759792.

The previous prime is 1390547. The next prime is 1390573. The reversal of 1390557 is 7550931.

It is a happy number.

It is not a de Polignac number, because 1390557 - 2⁴ = 1390541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957 + ... + 1922.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

2^1390557 is an apocalyptic number.

It is an amenable number.

1390557 is a deficient number, since it is larger than the sum of its proper divisors (821283).

1390557 is a wasteful number, since it uses less digits than its factorization.

1390557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 1390557 is about 1179.2188092123. The cubic root of 1390557 is about 111.6168080181.

The spelling of 1390557 in words is "one million, three hundred ninety thousand, five hundred fifty-seven".