155742025 has 12 divisors (see below), whose sum is σ = 193862592. Its totient is φ = 124114640.

The previous prime is 155742019. The next prime is 155742043. The reversal of 155742025 is 520247551.

It is not a de Polignac number, because 155742025 - 2³ = 155742017 is a prime.

It is a super-2 number, since 2×155742025² = 48511156702201250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 5269 + ... + 18418.

It is an arithmetic number, because the mean of its divisors is an integer number (16155216).

Almost surely, 2^155742025 is an apocalyptic number.

It is an amenable number.

155742025 is a deficient number, since it is larger than the sum of its proper divisors (38120567).

155742025 is a wasteful number, since it uses less digits than its factorization.

155742025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23960 (or 23955 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 155742025 is about 12479.6644586303. The cubic root of 155742025 is about 538.0243593951.

Adding to 155742025 its reverse (520247551), we get a palindrome (675989576).

The spelling of 155742025 in words is "one hundred fifty-five million, seven hundred forty-two thousand, twenty-five".