1921010 has 32 divisors (see below), whose sum is σ = 4257792. Its totient is φ = 607680.

The previous prime is 1920991. The next prime is 1921013. The reversal of 1921010 is 101291.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (133056).

2^1921010 is an apocalyptic number.

1921010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1921010 is an abundant number, since it is smaller than the sum of its proper divisors (2336782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1921010 is a wasteful number, since it uses less digits than its factorization.

1921010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1921010 is about 1386.0050504958. The cubic root of 1921010 is about 124.3110902013.

Subtracting from 1921010 its sum of digits (14), we obtain a square (1920996 = 1386²).

The spelling of 1921010 in words is "one million, nine hundred twenty-one thousand, ten".