1945521 has 12 divisors (see below), whose sum is σ = 2836548. Its totient is φ = 1284864.

The previous prime is 1945519. The next prime is 1945549. The reversal of 1945521 is 1255491.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 1199025 = 864^2 + 1095^2 .

It is not a de Polignac number, because 1945521 - 2¹ = 1945519 is a prime.

It is a super-2 number, since 2×1945521² = 7570103922882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (236379).

2^1945521 is an apocalyptic number.

It is an amenable number.

1945521 is a deficient number, since it is larger than the sum of its proper divisors (891027).

1945521 is a wasteful number, since it uses less digits than its factorization.

1945521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032 (or 2029 counting only the distinct ones).

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

The square root of 1945521 is about 1394.8193431409. The cubic root of 1945521 is about 124.8375703576.

The spelling of 1945521 in words is "one million, nine hundred forty-five thousand, five hundred twenty-one".