1881513 has 12 divisors (see below), whose sum is σ = 2861040. Its totient is φ = 1188216.

The previous prime is 1881511. The next prime is 1881521. The reversal of 1881513 is 3151881.

It is not a de Polignac number, because 1881513 - 2¹ = 1881511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1881511) 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, 5331 + ... + 5672.

It is an arithmetic number, because the mean of its divisors is an integer number (238420).

2^1881513 is an apocalyptic number.

It is an amenable number.

1881513 is a deficient number, since it is larger than the sum of its proper divisors (979527).

1881513 is a wasteful number, since it uses less digits than its factorization.

1881513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028 (or 11025 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1881513 is about 1371.6825434480. The cubic root of 1881513 is about 123.4532159555.

It can be divided in two parts, 188151 and 3, that multiplied together give a triangular number (564453 = T₁₀₆₂).

The spelling of 1881513 in words is "one million, eight hundred eighty-one thousand, five hundred thirteen".