52145402 has 4 divisors (see below), whose sum is σ = 78218106. Its totient is φ = 26072700.

The previous prime is 52145389. The next prime is 52145407. The reversal of 52145402 is 20454125.

It is a happy number.

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., 28826161 + 23319241 = 5369^2 + 4829^2 .

It is not an unprimeable number, because it can be changed into a prime (52145407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13036349 + ... + 13036352.

Almost surely, 2^52145402 is an apocalyptic number.

52145402 is a deficient number, since it is larger than the sum of its proper divisors (26072704).

52145402 is a wasteful number, since it uses less digits than its factorization.

52145402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26072703.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 52145402 is about 7221.1773278324. The cubic root of 52145402 is about 373.5986858912.

Adding to 52145402 its reverse (20454125), we get a palindrome (72599527).

The spelling of 52145402 in words is "fifty-two million, one hundred forty-five thousand, four hundred two".