1023945 has 32 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 489984.

The previous prime is 1023943. The next prime is 1023947. The reversal of 1023945 is 5493201.

1023945 = T₁₀₅ + T₁₀₆ + ... + T₁₉₃.

It is an interprime number because it is at equal distance from previous prime (1023943) and next prime (1023947).

It is not a de Polignac number, because 1023945 - 2¹ = 1023943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023941) 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, 11461 + ... + 11549.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2^1023945 is an apocalyptic number.

1023945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023945 is a deficient number, since it is larger than the sum of its proper divisors (790455).

1023945 is a wasteful number, since it uses less digits than its factorization.

1023945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1023945 is about 1011.9016750653. The cubic root of 1023945 is about 100.7918793849.

The spelling of 1023945 in words is "one million, twenty-three thousand, nine hundred forty-five".