1961457 has 4 divisors (see below), whose sum is σ = 2615280. Its totient is φ = 1307636.

The previous prime is 1961447. The next prime is 1961461. The reversal of 1961457 is 7541691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1961457 - 2⁴ = 1961441 is a prime.

It is a D-number.

1961457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1961447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326907 + ... + 326912.

It is an arithmetic number, because the mean of its divisors is an integer number (653820).

2^1961457 is an apocalyptic number.

It is an amenable number.

1961457 is a deficient number, since it is larger than the sum of its proper divisors (653823).

1961457 is an equidigital number, since it uses as much as digits as its factorization.

1961457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653822.

The product of its digits is 7560, while the sum is 33.

The square root of 1961457 is about 1400.5202604747. The cubic root of 1961457 is about 125.1774971721.

It can be divided in two parts, 196 and 1457, that added together give a triangular number (1653 = T₅₇).

The spelling of 1961457 in words is "one million, nine hundred sixty-one thousand, four hundred fifty-seven".