1020154 has 4 divisors (see below), whose sum is σ = 1530234. Its totient is φ = 510076.

The previous prime is 1020143. The next prime is 1020157. The reversal of 1020154 is 4510201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4510201 = 19 ⋅237379.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 388129 = 795^2 + 623^2 .

It is not an unprimeable number, because it can be changed into a prime (1020157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255037 + ... + 255040.

2^1020154 is an apocalyptic number.

1020154 is a deficient number, since it is larger than the sum of its proper divisors (510080).

1020154 is an equidigital number, since it uses as much as digits as its factorization.

1020154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510079.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1020154 is about 1010.0267323195. The cubic root of 1020154 is about 100.6673367108.

Adding to 1020154 its reverse (4510201), we get a palindrome (5530355).

It can be divided in two parts, 1020 and 154, that multiplied together give a triangular number (157080 = T₅₆₀).

The spelling of 1020154 in words is "one million, twenty thousand, one hundred fifty-four".