1206640954 has 4 divisors (see below), whose sum is σ = 1809961434. Its totient is φ = 603320476.

The previous prime is 1206640951. The next prime is 1206640987. The reversal of 1206640954 is 4590466021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1100447929 + 106193025 = 33173^2 + 10305^2 .

It is not an unprimeable number, because it can be changed into a prime (1206640951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301660237 + ... + 301660240.

Almost surely, 2^1206640954 is an apocalyptic number.

1206640954 is a deficient number, since it is larger than the sum of its proper divisors (603320480).

1206640954 is an equidigital number, since it uses as much as digits as its factorization.

1206640954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603320479.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1206640954 is about 34736.7378145962. The cubic root of 1206640954 is about 1064.6152603814.

The spelling of 1206640954 in words is "one billion, two hundred six million, six hundred forty thousand, nine hundred fifty-four".