1428015 has 32 divisors (see below), whose sum is σ = 2451456. Its totient is φ = 708480.

The previous prime is 1428013. The next prime is 1428029. The reversal of 1428015 is 5108241.

It is not a de Polignac number, because 1428015 - 2¹ = 1428013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1427982 and 1428000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17164 + ... + 17246.

It is an arithmetic number, because the mean of its divisors is an integer number (76608).

2^1428015 is an apocalyptic number.

1428015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1428015 is a deficient number, since it is larger than the sum of its proper divisors (1023441).

1428015 is a wasteful number, since it uses less digits than its factorization.

1428015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1428015 is about 1194.9958158923. The cubic root of 1428015 is about 112.6101636938.

The spelling of 1428015 in words is "one million, four hundred twenty-eight thousand, fifteen".