1457990 has 8 divisors (see below), whose sum is σ = 2624400. Its totient is φ = 583192.

The previous prime is 1457983. The next prime is 1457999. The reversal of 1457990 is 997541.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1457990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1457999) 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, 72890 + ... + 72909.

It is an arithmetic number, because the mean of its divisors is an integer number (328050).

2^1457990 is an apocalyptic number.

1457990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1457990 is a deficient number, since it is larger than the sum of its proper divisors (1166410).

1457990 is a wasteful number, since it uses less digits than its factorization.

1457990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145806.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1457990 is about 1207.4725669762. The cubic root of 1457990 is about 113.3926352469.

The spelling of 1457990 in words is "one million, four hundred fifty-seven thousand, nine hundred ninety".