1977534 has 48 divisors (see below), whose sum is σ = 4800432. Its totient is φ = 606528.

The previous prime is 1977529. The next prime is 1977541. The reversal of 1977534 is 4357791.

It is a happy number.

It is a d-powerful number, because it can be written as 1 + 9 + 7 + 7⁵ + 5⁹ + 3⁸ + 4⁵ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6162 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (100009).

2^1977534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400216).

1977534 is an abundant number, since it is smaller than the sum of its proper divisors (2822898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1977534 is a wasteful number, since it uses less digits than its factorization.

1977534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 331 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 1977534 is about 1406.2481999988. The cubic root of 1977534 is about 125.5185710310.

The spelling of 1977534 in words is "one million, nine hundred seventy-seven thousand, five hundred thirty-four".