1961487 has 12 divisors (see below), whose sum is σ = 3090984. Its totient is φ = 1188720.

The previous prime is 1961483. The next prime is 1961489. The reversal of 1961487 is 7841691.

It is not a de Polignac number, because 1961487 - 2² = 1961483 is a prime.

It is an Ulam number.

1961487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9808 + ... + 10005.

It is an arithmetic number, because the mean of its divisors is an integer number (257582).

2^1961487 is an apocalyptic number.

1961487 is a deficient number, since it is larger than the sum of its proper divisors (1129497).

1961487 is a wasteful number, since it uses less digits than its factorization.

1961487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19830 (or 19827 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1961487 is about 1400.5309707393. The cubic root of 1961487 is about 125.1781353551.

It can be divided in two parts, 19614 and 87, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 1961487 in words is "one million, nine hundred sixty-one thousand, four hundred eighty-seven".