312001402 has 4 divisors (see below), whose sum is σ = 468002106. Its totient is φ = 156000700.

The previous prime is 312001387. The next prime is 312001409. The reversal of 312001402 is 204100213.

312001402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204100213 = 79 ⋅2583547.

It can be written as a sum of positive squares in only one way, i.e., 287607681 + 24393721 = 16959^2 + 4939^2 .

It is not an unprimeable number, because it can be changed into a prime (312001409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78000349 + ... + 78000352.

Almost surely, 2^312001402 is an apocalyptic number.

312001402 is a deficient number, since it is larger than the sum of its proper divisors (156000704).

312001402 is a wasteful number, since it uses less digits than its factorization.

312001402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156000703.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 312001402 is about 17663.5614189212. The cubic root of 312001402 is about 678.2433045155.

Adding to 312001402 its reverse (204100213), we get a palindrome (516101615).

The spelling of 312001402 in words is "three hundred twelve million, one thousand, four hundred two".