154402 has 4 divisors (see below), whose sum is σ = 231606. Its totient is φ = 77200.

The previous prime is 154387. The next prime is 154409. The reversal of 154402 is 204451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204451 = 13 ⋅15727.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 1521 = 391^2 + 39^2 .

It is not an unprimeable number, because it can be changed into a prime (154409) by changing a digit.

154402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38599 + ... + 38602.

2¹⁵⁴⁴⁰² is an apocalyptic number.

154402 is a deficient number, since it is larger than the sum of its proper divisors (77204).

154402 is an equidigital number, since it uses as much as digits as its factorization.

154402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77203.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 154402 is about 392.9401990125. The cubic root of 154402 is about 53.6476834900.

Adding to 154402 its reverse (204451), we get a palindrome (358853).

The spelling of 154402 in words is "one hundred fifty-four thousand, four hundred two".