1972154 has 8 divisors (see below), whose sum is σ = 2965140. Its totient is φ = 983776.

The previous prime is 1972147. The next prime is 1972169. The reversal of 1972154 is 4512791.

It can be written as a sum of positive squares in 2 ways, for example, as 1885129 + 87025 = 1373^2 + 295^2 .

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

It is a Curzon number.

It is a plaindrome in base 11.

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 3 ways as a sum of consecutive naturals, for example, 272 + ... + 2004.

2^1972154 is an apocalyptic number.

1972154 is a deficient number, since it is larger than the sum of its proper divisors (992986).

1972154 is a wasteful number, since it uses less digits than its factorization.

1972154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its digits is 2520, while the sum is 29.

The square root of 1972154 is about 1404.3340058547. The cubic root of 1972154 is about 125.4046407137.

The spelling of 1972154 in words is "one million, nine hundred seventy-two thousand, one hundred fifty-four".