154940521 has 2 divisors, whose sum is σ = 154940522. Its totient is φ = 154940520.

The previous prime is 154940501. The next prime is 154940551. The reversal of 154940521 is 125049451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152250921 + 2689600 = 12339^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 154940521 - 2⁷ = 154940393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (154940501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77470260 + 77470261.

It is an arithmetic number, because the mean of its divisors is an integer number (77470261).

Almost surely, 2^154940521 is an apocalyptic number.

It is an amenable number.

154940521 is a deficient number, since it is larger than the sum of its proper divisors (1).

154940521 is an equidigital number, since it uses as much as digits as its factorization.

154940521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 154940521 is about 12447.5106346611. The cubic root of 154940521 is about 537.0998164945.

Adding to 154940521 its reverse (125049451), we get a palindrome (279989972).

The spelling of 154940521 in words is "one hundred fifty-four million, nine hundred forty thousand, five hundred twenty-one".