1972690 has 8 divisors (see below), whose sum is σ = 3550860. Its totient is φ = 789072.

The previous prime is 1972669. The next prime is 1972717. The reversal of 1972690 is 962791.

It can be written as a sum of positive squares in 2 ways, for example, as 1857769 + 114921 = 1363^2 + 339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1972690² = 7783011672200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98625 + ... + 98644.

2^1972690 is an apocalyptic number.

1972690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1972690 is a deficient number, since it is larger than the sum of its proper divisors (1578170).

1972690 is a wasteful number, since it uses less digits than its factorization.

1972690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197276.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1972690 is about 1404.5248306812. The cubic root of 1972690 is about 125.4160006783.

It can be divided in two parts, 1972 and 690, that added together give a palindrome (2662).

The spelling of 1972690 in words is "one million, nine hundred seventy-two thousand, six hundred ninety".