1921077 has 20 divisors (see below), whose sum is σ = 2951916. Its totient is φ = 1244160.

The previous prime is 1921069. The next prime is 1921079. The reversal of 1921077 is 7701291.

It can be written as a sum of positive squares in 2 ways, for example, as 1726596 + 194481 = 1314^2 + 441^2 .

It is not a de Polignac number, because 1921077 - 2³ = 1921069 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1921077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921079) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2677 + ... + 3317.

2^1921077 is an apocalyptic number.

It is an amenable number.

1921077 is a deficient number, since it is larger than the sum of its proper divisors (1030839).

1921077 is an equidigital number, since it uses as much as digits as its factorization.

1921077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 1921077 is about 1386.0292204712. The cubic root of 1921077 is about 124.3125354040.

The spelling of 1921077 in words is "one million, nine hundred twenty-one thousand, seventy-seven".