1945215 has 24 divisors (see below), whose sum is σ = 3498768. Its totient is φ = 1036800.

The previous prime is 1945199. The next prime is 1945243. The reversal of 1945215 is 5125491.

It is not a de Polignac number, because 1945215 - 2⁴ = 1945199 is a prime.

It is a super-2 number, since 2×1945215² = 7567722792450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 415 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (145782).

2^1945215 is an apocalyptic number.

1945215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1945215 is a deficient number, since it is larger than the sum of its proper divisors (1553553).

1945215 is an equidigital number, since it uses as much as digits as its factorization.

1945215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1609 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1945215 is about 1394.7096472026. The cubic root of 1945215 is about 124.8310250159.

The spelling of 1945215 in words is "one million, nine hundred forty-five thousand, two hundred fifteen".