201245402 has 4 divisors (see below), whose sum is σ = 301868106. Its totient is φ = 100622700.

The previous prime is 201245381. The next prime is 201245411. The reversal of 201245402 is 204542102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204542102 = 2 ⋅102271051.

It can be written as a sum of positive squares in only one way, i.e., 178195801 + 23049601 = 13349^2 + 4801^2 .

It is a super-2 number, since 2×201245402² = 80999423652283208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50311349 + ... + 50311352.

Almost surely, 2^201245402 is an apocalyptic number.

201245402 is a deficient number, since it is larger than the sum of its proper divisors (100622704).

201245402 is a wasteful number, since it uses less digits than its factorization.

201245402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100622703.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 201245402 is about 14186.0988999795. The cubic root of 201245402 is about 586.0148959315.

Adding to 201245402 its reverse (204542102), we get a palindrome (405787504).

The spelling of 201245402 in words is "two hundred one million, two hundred forty-five thousand, four hundred two".