1961501 has 2 divisors, whose sum is σ = 1961502. Its totient is φ = 1961500.

The previous prime is 1961489. The next prime is 1961513. The reversal of 1961501 is 1051691.

It is a balanced prime because it is at equal distance from previous prime (1961489) and next prime (1961513).

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 900601 = 1030^2 + 949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980750 + 980751.

It is an arithmetic number, because the mean of its divisors is an integer number (980751).

2^1961501 is an apocalyptic number.

It is an amenable number.

1961501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961501 is an equidigital number, since it uses as much as digits as its factorization.

1961501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1961501 is about 1400.5359688348. The cubic root of 1961501 is about 125.1784331716.

The spelling of 1961501 in words is "one million, nine hundred sixty-one thousand, five hundred one".