1920761 has 2 divisors, whose sum is σ = 1920762. Its totient is φ = 1920760.

The previous prime is 1920739. The next prime is 1920769. The reversal of 1920761 is 1670291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 383161 = 1240^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920761 - 2¹⁸ = 1658617 is a prime.

It is a super-4 number, since 4×1920761⁴ (a number of 26 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1920761.

It is not a weakly prime, because it can be changed into another prime (1920769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960380 + 960381.

It is an arithmetic number, because the mean of its divisors is an integer number (960381).

2^1920761 is an apocalyptic number.

It is an amenable number.

1920761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920761 is an equidigital number, since it uses as much as digits as its factorization.

1920761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1920761 is about 1385.9152210723. The cubic root of 1920761 is about 124.3057189298.

The spelling of 1920761 in words is "one million, nine hundred twenty thousand, seven hundred sixty-one".