154521457 has 2 divisors, whose sum is σ = 154521458. Its totient is φ = 154521456.

The previous prime is 154521439. The next prime is 154521463. The reversal of 154521457 is 754125451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132158016 + 22363441 = 11496^2 + 4729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154521457 is a prime.

It is not a weakly prime, because it can be changed into another prime (154521407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77260728 + 77260729.

It is an arithmetic number, because the mean of its divisors is an integer number (77260729).

Almost surely, 2^154521457 is an apocalyptic number.

It is an amenable number.

154521457 is a deficient number, since it is larger than the sum of its proper divisors (1).

154521457 is an equidigital number, since it uses as much as digits as its factorization.

154521457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28000, while the sum is 34.

The square root of 154521457 is about 12430.6659918123. The cubic root of 154521457 is about 536.6151521780.

The spelling of 154521457 in words is "one hundred fifty-four million, five hundred twenty-one thousand, four hundred fifty-seven".